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        <title>
      Harvard College's Computer Science 50: Introduction to Computer Science I    </title>
          <itunes:subtitle>
        David J. Malan (malan@harvard.edu), Instructor      </itunes:subtitle>
        <description>
      Introduction to the intellectual enterprises of computer science and the art of programming.  This course teaches students how to think algorithmically and solve problems efficiently. Topics include abstraction, encapsulation, data structures, databases, memory management, software development, virtualization, and websites. Languages include C, PHP, and JavaScript plus SQL, CSS, and XHTML. Problem sets inspired by real-world domains of biology, cryptography, finance, forensics, and gaming. Designed for concentrators and non-concentrators alike, with or without prior programming experience.      This is OpenCourseWare, licensed by
      David J. Malan      of Harvard University under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License.  Visit http://cs50.tv/2009/fall/ for more material, including prior semesters and other courses.
    </description>
    <link>
      http://cs50.tv/2009/fall/    </link>
    <language>en-us</language>
    <copyright>
      Copyright © 2009 – 2013    </copyright>
          <itunes:author>
        David J. Malan      </itunes:author>
      <itunes:summary>
        Introduction to the intellectual enterprises of computer science and the art of programming.  This course teaches students how to think algorithmically and solve problems efficiently. Topics include abstraction, encapsulation, data structures, databases, memory management, software development, virtualization, and websites. Languages include C, PHP, and JavaScript plus SQL, CSS, and XHTML. Problem sets inspired by real-world domains of biology, cryptography, finance, forensics, and gaming. Designed for concentrators and non-concentrators alike, with or without prior programming experience.      </itunes:summary>
      <itunes:owner>
        <itunes:name>
          David J. Malan        </itunes:name>
        <itunes:email>
          malan@harvard.edu        </itunes:email>
      </itunes:owner>
      <itunes:category text="Education">
        <itunes:category text="Higher Education" />
      </itunes:category>
      <itunes:category text="Technology" />
      <itunes:image href="http://cdn.cs50.net/images/college.png" />
      <itunes:explicit>clean</itunes:explicit>
      <itunes:keywords>harvard, computer, science, c, programming, software</itunes:keywords>
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Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/4/week4w.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/bZekbtiYcxY/week4w.mp3" length="37902542" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/4/week4w.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 4 / Videos / Wednesday / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/ibmZ2Ngn5W4/week4w.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/ibmZ2Ngn5W4" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/4/week4w.mov</guid><itunes:author>David J. 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Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/5/notes5m.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/Dv6YIdk8Bio/notes5m.pdf" length="129943" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/5/notes5m.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 5 / Notes / Wednesday</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/vhya-sWpvpg/notes5w.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/vhya-sWpvpg" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/5/notes5w.pdf</guid><itunes:author>David J. 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Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/5/week5.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/CVIi2V4nDG0/week5.pdf" length="2034995" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/5/week5.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 5 / Source Code / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/fXMrnmIZdZ4/src5.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/fXMrnmIZdZ4" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/5/src5.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/5/src5.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/fXMrnmIZdZ4/src5.pdf" length="24382" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/5/src5.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 5 / Videos / Monday / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/HUEmH8xON6Y/week5m.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/HUEmH8xON6Y" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/5/week5m.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/5/week5m.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/HUEmH8xON6Y/week5m.mp3" length="33969603" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/5/week5m.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 5 / Videos / Monday / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/cZfuZKbhMCo/week5m.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/cZfuZKbhMCo" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/5/week5m.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/5/week5m.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/cZfuZKbhMCo/week5m.mov" length="304871794" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/5/week5m.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 5 / Videos / Wednesday / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/20g8tGNdKzA/week5w.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/20g8tGNdKzA" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/5/week5w.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/5/week5w.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/20g8tGNdKzA/week5w.mp3" length="32958734" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/5/week5w.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 5 / Videos / Wednesday / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/7eCyilVNMUk/week5w.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/7eCyilVNMUk" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/5/week5w.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/5/week5w.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/7eCyilVNMUk/week5w.mov" length="301076988" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/5/week5w.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 7 / Notes / Monday</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/-mIBOeFquWg/notes7m.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/-mIBOeFquWg" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/7/notes7m.pdf</guid><itunes:author>David J. 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Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/7/week7w.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/9hT_i-25NTQ/week7w.mp3" length="38569550" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/7/week7w.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 7 / Videos / Wednesday / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/_VclckFuVpY/week7w.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/_VclckFuVpY" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/7/week7w.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/7/week7w.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/_VclckFuVpY/week7w.mov" length="347803061" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/7/week7w.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 8 / Notes / Monday</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/iWxeOQm-keE/notes8m.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/iWxeOQm-keE" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/8/notes8m.pdf</guid><itunes:author>David J. 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Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/11/CS179.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/wvASYMVcRYw/CS179.pdf" length="2157663" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/11/CS179.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 11 / Videos / Monday / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/C6wgnZhvZyQ/week11m.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/C6wgnZhvZyQ" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/11/week11m.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/11/week11m.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/C6wgnZhvZyQ/week11m.mp3" length="26749732" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/11/week11m.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 11 / Videos / Monday / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/x8qgB3PJNxc/week11m.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/x8qgB3PJNxc" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/11/week11m.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/11/week11m.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/x8qgB3PJNxc/week11m.mov" length="238240734" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/11/week11m.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 12 / Demos / Hosting Your Fair / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/DdVmwq451Jw/hostFair.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/DdVmwq451Jw" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/shorts/hostFair.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/shorts/hostFair.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/DdVmwq451Jw/hostFair.mp3" length="2912267" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/shorts/hostFair.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 12 / Demos / Hosting Your Fair / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/kyMJyDyRknk/hostFair.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/kyMJyDyRknk" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/shorts/hostFair.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/shorts/hostFair.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/kyMJyDyRknk/hostFair.mov" length="26452829" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/shorts/hostFair.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 12 / Slides</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/mTFTeFHFPBk/week12.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/mTFTeFHFPBk" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/12/week12.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/12/week12.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/mTFTeFHFPBk/week12.pdf" length="4352679" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/12/week12.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 12 / Videos / Monday / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/7fZopCGYrbg/week12m.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/7fZopCGYrbg" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/12/week12m.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/12/week12m.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/7fZopCGYrbg/week12m.mp3" length="28387012" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/12/week12m.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Lectures / Week 12 / Videos / Monday / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/Fq5pneUPTYo/week12m.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/Fq5pneUPTYo" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/lectures/12/week12m.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/lectures/12/week12m.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/Fq5pneUPTYo/week12m.mov" length="255663251" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/lectures/12/week12m.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 1 / Video / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/4E89PErZlMU/section1.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/4E89PErZlMU" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/1/section1.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/1/section1.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/4E89PErZlMU/section1.mp3" length="29746374" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/1/section1.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 1 / Video / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/Myb8wxosiOw/section1.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/Myb8wxosiOw" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/1/section1.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/1/section1.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/Myb8wxosiOw/section1.mov" length="265372258" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/1/section1.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 2 / Notes</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/sgStme6Nm_g/section2.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/sgStme6Nm_g" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/2/section2.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/2/section2.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/sgStme6Nm_g/section2.pdf" length="224017" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/2/section2.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 2 / Video / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/2WmuCI-O9-k/section2.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/2WmuCI-O9-k" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/2/section2.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/2/section2.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/2WmuCI-O9-k/section2.mp3" length="28986054" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/2/section2.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 2 / Video / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/fulafKSCWsg/section2.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/fulafKSCWsg" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/2/section2.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/2/section2.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/fulafKSCWsg/section2.mov" length="259823985" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/2/section2.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 3 / Notes</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/DhQ7Web92DY/section3.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/DhQ7Web92DY" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/3/section3.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/3/section3.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/DhQ7Web92DY/section3.pdf" length="208088" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/3/section3.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 3 / Video / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/l3tAcln3ScE/section3.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/l3tAcln3ScE" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/3/section3.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/3/section3.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/l3tAcln3ScE/section3.mp3" length="24665480" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/3/section3.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 3 / Video / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/B0lf09-dfag/section3.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/B0lf09-dfag" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/3/section3.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/3/section3.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/B0lf09-dfag/section3.mov" length="223516544" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/3/section3.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 4 / Notes</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/Ccue2s9InFE/section4.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/Ccue2s9InFE" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/4/section4.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/4/section4.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/Ccue2s9InFE/section4.pdf" length="72968" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/4/section4.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 4 / Video / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/B_QyTvsZpAg/section4.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/B_QyTvsZpAg" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/4/section4.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/4/section4.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/B_QyTvsZpAg/section4.mp3" length="24603558" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/4/section4.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 4 / Video / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/qwJ1ylpB1mc/section4.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/qwJ1ylpB1mc" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/4/section4.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/4/section4.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/qwJ1ylpB1mc/section4.mov" length="213028837" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/4/section4.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 5 / Answers to Study Questions in Notes</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/oUgWBlTpwm0/answers5.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/oUgWBlTpwm0" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/5/answers5.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/5/answers5.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/oUgWBlTpwm0/answers5.pdf" length="64653" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/5/answers5.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 5 / Notes</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/_reAWgWR6nI/section5.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/_reAWgWR6nI" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/5/section5.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/5/section5.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/_reAWgWR6nI/section5.pdf" length="92752" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/5/section5.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 6 / Notes</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/A4khKyqgIDY/section6.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/A4khKyqgIDY" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/6/section6.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/6/section6.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/A4khKyqgIDY/section6.pdf" length="104677" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/6/section6.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 6 / Video / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/QhLigbB3Vvw/section6.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/QhLigbB3Vvw" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/6/section6.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/6/section6.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/QhLigbB3Vvw/section6.mp3" length="25692774" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/6/section6.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 6 / Video / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/Fz6CfziFWBs/section6.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/Fz6CfziFWBs" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/6/section6.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/6/section6.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/Fz6CfziFWBs/section6.mov" length="229004854" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/6/section6.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 7 / Notes</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/2MMxLtn2EYU/section7.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/2MMxLtn2EYU" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/7/section7.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/7/section7.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/2MMxLtn2EYU/section7.pdf" length="277639" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/7/section7.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 7 / Video / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/U2ILZJxE1aE/section7.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/U2ILZJxE1aE" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/7/section7.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/7/section7.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/U2ILZJxE1aE/section7.mp3" length="26294406" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/7/section7.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 7 / Video / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/IwR7KyAKsDk/section7.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/IwR7KyAKsDk" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/7/section7.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/7/section7.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/IwR7KyAKsDk/section7.mov" length="240990620" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/7/section7.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 8 / Notes</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/uYJWuAhEcCc/section8.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/uYJWuAhEcCc" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/8/section8.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/8/section8.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/uYJWuAhEcCc/section8.pdf" length="146291" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/8/section8.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 8 / Video / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/K2LwKiPDQh4/section8.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/K2LwKiPDQh4" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/8/section8.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/8/section8.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/K2LwKiPDQh4/section8.mp3" length="18189510" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/8/section8.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 8 / Video / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/JeYXa8Qc128/section8.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/JeYXa8Qc128" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/8/section8.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/8/section8.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/JeYXa8Qc128/section8.mov" length="163697203" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/8/section8.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 9 / Notes</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/SqZZdkdA1Fo/section9.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/SqZZdkdA1Fo" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/9/section9.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/9/section9.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/SqZZdkdA1Fo/section9.pdf" length="152326" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/9/section9.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 9 / Video / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/lFluRNbKgbE/section9.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/lFluRNbKgbE" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/9/section9.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/9/section9.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/lFluRNbKgbE/section9.mp3" length="26659878" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/9/section9.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 9 / Video / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/9dN0PrSV_50/section9.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/9dN0PrSV_50" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/9/section9.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/9/section9.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/9dN0PrSV_50/section9.mov" length="241858662" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/9/section9.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 10 / Video / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/ATEf1brJe8c/section10.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/ATEf1brJe8c" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/10/section10.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/10/section10.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/ATEf1brJe8c/section10.mp3" length="27125575" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/10/section10.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Sections / Week 10 / Video / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/p3Eh5u4hnEQ/section10.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/p3Eh5u4hnEQ" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/sections/10/section10.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/sections/10/section10.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/p3Eh5u4hnEQ/section10.mov" length="247003163" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/sections/10/section10.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 0: Scratch / standard edition</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/mzNL0WfyFNU/pset0.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/mzNL0WfyFNU" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/0/pset0.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/0/pset0.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/mzNL0WfyFNU/pset0.pdf" length="201048" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/0/pset0.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 0: Scratch / Hacker Edition</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/cT9RzC77b68/hacker0.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/cT9RzC77b68" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/0/hacker0.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/0/hacker0.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/cT9RzC77b68/hacker0.pdf" length="331640" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/0/hacker0.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 1: C / standard edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/lOykgPg9AJ4/pset1.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/lOykgPg9AJ4" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/1/pset1.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/1/pset1.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/lOykgPg9AJ4/pset1.pdf" length="227019" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/1/pset1.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 1: C / standard edition / Walkthrough / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/2wCVowf9Dzk/walkthrough1.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/2wCVowf9Dzk" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/1/walkthrough1.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/1/walkthrough1.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/2wCVowf9Dzk/walkthrough1.mp3" length="16369354" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/1/walkthrough1.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 1: C / standard edition / Walkthrough / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/AFSnfHr3wOQ/walkthrough1.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/AFSnfHr3wOQ" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/1/walkthrough1.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/1/walkthrough1.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/AFSnfHr3wOQ/walkthrough1.mov" length="279616300" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/1/walkthrough1.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 1: C / Hacker Edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/3YRx3Kc8O-M/hacker1.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/3YRx3Kc8O-M" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/1/hacker1.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/1/hacker1.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/3YRx3Kc8O-M/hacker1.pdf" length="268568" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/1/hacker1.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 2: Crypto / standard edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/icPzUX0Mjuo/pset2.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/icPzUX0Mjuo" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/2/pset2.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/2/pset2.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/icPzUX0Mjuo/pset2.pdf" length="109685" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/2/pset2.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 2: Crypto / standard edition / Walkthrough / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/HMRpqde2L08/walkthrough2.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/HMRpqde2L08" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/2/walkthrough2.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/2/walkthrough2.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/HMRpqde2L08/walkthrough2.mp3" length="30665098" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/2/walkthrough2.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 2: Crypto / standard edition / Walkthrough / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/Ac81m3n6T4s/walkthrough2.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/Ac81m3n6T4s" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/2/walkthrough2.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/2/walkthrough2.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/Ac81m3n6T4s/walkthrough2.mov" length="523182026" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/2/walkthrough2.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 2: Crypto / Hacker Edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/I2TmixgtD08/hacker2.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/I2TmixgtD08" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/2/hacker2.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/2/hacker2.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/I2TmixgtD08/hacker2.pdf" length="108291" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/2/hacker2.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 3: The Game of Fifteen / standard edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/6my4nzmJ1Z4/pset3.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/6my4nzmJ1Z4" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/3/pset3.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/3/pset3.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/6my4nzmJ1Z4/pset3.pdf" length="141772" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/3/pset3.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 3: The Game of Fifteen / standard edition / Walkthrough / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/vhoRA1e0Fqo/walkthrough3.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/vhoRA1e0Fqo" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/3/walkthrough3.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/3/walkthrough3.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/vhoRA1e0Fqo/walkthrough3.mp3" length="23031370" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/3/walkthrough3.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 3: The Game of Fifteen / standard edition / Walkthrough / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/0lWekDnxxic/walkthrough3.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/0lWekDnxxic" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/3/walkthrough3.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/3/walkthrough3.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/0lWekDnxxic/walkthrough3.mov" length="206933143" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/3/walkthrough3.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 3: The Game of Fifteen / Hacker Edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/T27VqtnlFvI/hacker3.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/T27VqtnlFvI" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/3/hacker3.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/3/hacker3.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/T27VqtnlFvI/hacker3.pdf" length="197669" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/3/hacker3.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 4: Sudoku / standard edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/igKEMNXWmso/pset4.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/igKEMNXWmso" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/4/pset4.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/4/pset4.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/igKEMNXWmso/pset4.pdf" length="353943" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/4/pset4.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 4: Sudoku / standard edition / Walkthrough / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/ERSViugMfls/walkthrough4.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/ERSViugMfls" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/4/walkthrough4.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/4/walkthrough4.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/ERSViugMfls/walkthrough4.mp3" length="26763562" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/4/walkthrough4.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 4: Sudoku / standard edition / Walkthrough / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/J2OTGSbbn6I/walkthrough4.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/J2OTGSbbn6I" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/4/walkthrough4.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/4/walkthrough4.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/J2OTGSbbn6I/walkthrough4.pdf" length="88935" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/4/walkthrough4.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 4: Sudoku / standard edition / Walkthrough / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/nXc4owlohJk/walkthrough4.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/nXc4owlohJk" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/4/walkthrough4.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/4/walkthrough4.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/nXc4owlohJk/walkthrough4.mov" length="239946172" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/4/walkthrough4.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 4: Sudoku / Hacker Edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/Qe9FdsO6MxY/hacker4.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/Qe9FdsO6MxY" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/4/hacker4.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/4/hacker4.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/Qe9FdsO6MxY/hacker4.pdf" length="418545" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/4/hacker4.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 5: Forensics / standard edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/eFkF8KFKYZ8/pset5.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/eFkF8KFKYZ8" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/5/pset5.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/5/pset5.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/eFkF8KFKYZ8/pset5.pdf" length="199372" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/5/pset5.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 5: Forensics / standard edition / Walkthrough / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/uIndj6JZkU8/walkthrough5.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/uIndj6JZkU8" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/5/walkthrough5.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/5/walkthrough5.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/uIndj6JZkU8/walkthrough5.mp3" length="26769322" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/5/walkthrough5.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 5: Forensics / standard edition / Walkthrough / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/7ks_9ok2XT0/walkthrough5.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/7ks_9ok2XT0" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/5/walkthrough5.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/5/walkthrough5.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/7ks_9ok2XT0/walkthrough5.pdf" length="686049" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/5/walkthrough5.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 5: Forensics / standard edition / Walkthrough / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/qgg8eGsX5_w/walkthrough5.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/qgg8eGsX5_w" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/5/walkthrough5.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/5/walkthrough5.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/qgg8eGsX5_w/walkthrough5.mov" length="239055897" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/5/walkthrough5.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 5: Forensics / Hacker Edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/IKdiVADrMag/hacker5.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/IKdiVADrMag" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/5/hacker5.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/5/hacker5.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/IKdiVADrMag/hacker5.pdf" length="251861" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/5/hacker5.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 6: Mispellings / standard edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/02KZZCJ6Iys/pset6.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/02KZZCJ6Iys" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/6/pset6.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/6/pset6.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/02KZZCJ6Iys/pset6.pdf" length="257493" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/6/pset6.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 6: Mispellings / standard edition / Walkthrough / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/wzD1wn7edXQ/walkthrough6.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/wzD1wn7edXQ" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/6/walkthrough6.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/6/walkthrough6.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/wzD1wn7edXQ/walkthrough6.mp3" length="27012394" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/6/walkthrough6.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 6: Mispellings / standard edition / Walkthrough / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/cPN6_HJb2Gg/walkthrough6.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/cPN6_HJb2Gg" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/6/walkthrough6.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/6/walkthrough6.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/cPN6_HJb2Gg/walkthrough6.pdf" length="228112" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/6/walkthrough6.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 6: Mispellings / standard edition / Walkthrough / QuickTime</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/rlIBvKbkQuo/walkthrough6.mov</link><description>QuickTime format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/rlIBvKbkQuo" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/6/walkthrough6.mov</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/6/walkthrough6.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/rlIBvKbkQuo/walkthrough6.mov" length="244424995" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/6/walkthrough6.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 7: C$50 Finance / standard edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/gv4SdlMWBys/pset7.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/gv4SdlMWBys" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/7/pset7.pdf</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>PDF format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/7/pset7.pdf</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/gv4SdlMWBys/pset7.pdf" length="272610" type="application/pdf" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/7/pset7.pdf</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 7: C$50 Finance / standard edition / Walkthrough / MP3</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/oQnR4wChcNM/walkthrough7.mp3</link><description>MP3 format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/oQnR4wChcNM" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/7/walkthrough7.mp3</guid><itunes:author>David J. Malan</itunes:author><itunes:summary>MP3 format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/7/walkthrough7.mp3</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/oQnR4wChcNM/walkthrough7.mp3" length="25540426" type="audio/mpeg" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/7/walkthrough7.mp3</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 7: C$50 Finance / standard edition / Walkthrough / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/G37u2qzmUmo/walkthrough7.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/G37u2qzmUmo" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/7/walkthrough7.pdf</guid><itunes:author>David J. 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Malan</itunes:author><itunes:summary>QuickTime format</itunes:summary><pubDate>Mon, 31 Aug 2009 20:00:00 -0400</pubDate><feedburner:origLink>http://cdn.cs50.net/2009/fall/psets/7/walkthrough7.mov</feedburner:origLink><enclosure url="http://feedproxy.google.com/~r/cs50/2009/fall/rss/~5/0m318h45poI/walkthrough7.mov" length="230180695" type="video/quicktime" /><feedburner:origEnclosureLink>http://cdn.cs50.net/2009/fall/psets/7/walkthrough7.mov</feedburner:origEnclosureLink></item><item><itunesu:category itunesu:code="101102" /><title>Problem Sets / Problem Set 8: Mashup / standard edition / PDF</title><link>http://feedproxy.google.com/~r/cs50/2009/fall/rss/~3/1pYKtzemww8/pset8.pdf</link><description>PDF format&lt;img src="http://feeds.feedburner.com/~r/cs50/2009/fall/rss/~4/1pYKtzemww8" height="1" width="1"/&gt;</description><guid isPermaLink="false">http://cdn.cs50.net/2009/fall/psets/8/pset8.pdf</guid><itunes:author>David J. 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