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	<title>xxeo</title>
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	<link>http://xxeo.com</link>
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	Mon, 14 Apr 2025 20:30:18 +0000	</lastBuildDate>
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	<item>
		<title>Lisp Match</title>
		<link>http://xxeo.com/archives/2014/02/18/lisp-match.html</link>
				<pubDate>Tue, 18 Feb 2014 22:09:49 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1284</guid>
				<description><![CDATA[(DEF MATCH (PATTERN ASSERTION) (COND ((EQUAL PATTERN '?) T) ((AND (ATOM PATTERN) (EQUAL PATTERN ASSERTION)) T) ((ATOM PATTERN) NIL) ((ATOM ASSERTION) NIL) (T (AND (MATCH (FIRST PATTERN) (FIRST ASSERTION)) (MATCH (REST PATTERN) (REST ASSERTION)))))) FIRST &#60;- CAR REST &#60;- CDR]]></description>
								<content:encoded><![CDATA[<pre>(DEF MATCH (PATTERN ASSERTION)
   (COND ((EQUAL PATTERN '?) T)
         ((AND (ATOM PATTERN)
               (EQUAL PATTERN ASSERTION)) T)
         ((ATOM PATTERN) NIL)
         ((ATOM ASSERTION) NIL)
         (T (AND (MATCH (FIRST PATTERN) (FIRST ASSERTION))
                 (MATCH (REST PATTERN) (REST ASSERTION))))))
</pre>

<pre>FIRST &lt;- CAR
REST &lt;- CDR
</pre>
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		<item>
		<title>Rob Barton Quote</title>
		<link>http://xxeo.com/archives/2013/03/22/rob-barton-quote.html</link>
				<pubDate>Fri, 22 Mar 2013 20:23:19 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1222</guid>
				<description><![CDATA[&#8220;Systems programmers are the high priests of a low cult.&#8221; &#160; Robert &#8220;Bob&#8221; Barton (1967)]]></description>
								<content:encoded><![CDATA[<blockquote>&#8220;Systems programmers are the high priests of a low cult.&#8221;</blockquote>

<blockquote>
&nbsp;</blockquote>

<blockquote>
<small>Robert &#8220;Bob&#8221; Barton (1967)</small></blockquote>
]]></content:encoded>
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		<item>
		<title>ARPA NETWORK 1973</title>
		<link>http://xxeo.com/archives/2013/03/19/arpa-network-1973.html</link>
				<pubDate>Wed, 20 Mar 2013 06:28:38 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1215</guid>
				<description><![CDATA[Almost 40 years ago.]]></description>
								<content:encoded><![CDATA[<p><a href="http://www.xxeo.com/content/uploads/2013/03/Screen-Shot-2013-03-19-at-11.24.32-PM.png"><img src="http://www.xxeo.com/content/uploads/2013/03/Screen-Shot-2013-03-19-at-11.24.32-PM.png" alt="Screen Shot 2013-03-19 at 11.24.32 PM" width="798" height="631" class="alignnone size-full wp-image-1216" srcset="http://xxeo.com/content/uploads/2013/03/Screen-Shot-2013-03-19-at-11.24.32-PM.png 798w, http://xxeo.com/content/uploads/2013/03/Screen-Shot-2013-03-19-at-11.24.32-PM-300x237.png 300w" sizes="(max-width: 798px) 100vw, 798px" /></a></p>

<p>Almost 40 years ago.</p>
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		<item>
		<title>The Old Dr. Dobbs</title>
		<link>http://xxeo.com/archives/2013/02/01/the-old-dr-dobbs.html</link>
				<pubDate>Fri, 01 Feb 2013 12:22:12 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1200</guid>
				<description><![CDATA[]]></description>
								<content:encoded><![CDATA[<p><a href="http://www.xxeo.com/content/uploads/2013/02/Screen-Shot-2012-12-02-at-12.18.27-AM.png"><img src="http://www.xxeo.com/content/uploads/2013/02/Screen-Shot-2012-12-02-at-12.18.27-AM.png" alt="Screen Shot 2012-12-02 at 12.18.27 AM" width="757" height="990" class="alignnone size-full wp-image-1201" srcset="http://xxeo.com/content/uploads/2013/02/Screen-Shot-2012-12-02-at-12.18.27-AM.png 757w, http://xxeo.com/content/uploads/2013/02/Screen-Shot-2012-12-02-at-12.18.27-AM-229x300.png 229w" sizes="(max-width: 757px) 100vw, 757px" /></a></p>
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		<title>Experience one of my first big computers: the ATT 3B1</title>
		<link>http://xxeo.com/archives/2012/10/17/experience-one-of-my-first-big-computers-the-att-3b1.html</link>
				<comments>http://xxeo.com/archives/2012/10/17/experience-one-of-my-first-big-computers-the-att-3b1.html#comments</comments>
				<pubDate>Thu, 18 Oct 2012 01:52:14 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1179</guid>
				<description><![CDATA[A long time ago now, in the 1990 or 1991 timeframe, I bought an ATT 3B1. It was my first true Unix machine. I could tell you lots about it, but there is a Wikipedia page up for it already &#8230; <a href="http://xxeo.com/archives/2012/10/17/experience-one-of-my-first-big-computers-the-att-3b1.html">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
								<content:encoded><![CDATA[<p>A long time ago now, in the 1990 or 1991 timeframe, I bought an ATT 3B1. It was my first true Unix machine.</p>

<p>I could tell you lots about it, but there is a Wikipedia page up for it already (<a href="http://en.wikipedia.org/wiki/3B1">the ATT 3B1</a>).</p>

<p>The interesting message is the perspective of time.</p>

<p>Some nut actually preserved for eternity the startup or boot process on video. Look at how long this takes and listen to how loud that hard drive is:</p>

<p><a href="http://en.wikipedia.org/wiki/File:Att-unixpc-booting.ogg">GO HERE TO SEE AND HEAR WHAT IT WAS LIKE TO BOOT THIS DEVICE</a></p>

<p><img src="https://s.w.org/images/core/emoji/11.2.0/72x72/1f642.png" alt="🙂" class="wp-smiley" style="height: 1em; max-height: 1em;" /></p>
]]></content:encoded>
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		<slash:comments>2</slash:comments>
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			</item>
		<item>
		<title>Great article on Waterfall / The Power of Open Access to Information</title>
		<link>http://xxeo.com/archives/2012/08/30/great-article-on-waterfall-the-power-of-open-access-to-information.html</link>
				<pubDate>Thu, 30 Aug 2012 21:35:35 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1155</guid>
				<description><![CDATA[First, someone in the agile camp actually reads the original description on &#8216;Waterfall&#8217; from 1970. Surprise &#8211; it is really really close to agile. This is a great read. Hopefully, this will end a lot of the debates on terminology &#8230; <a href="http://xxeo.com/archives/2012/08/30/great-article-on-waterfall-the-power-of-open-access-to-information.html">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
								<content:encoded><![CDATA[<p>First, someone in the agile camp actually reads the <em>original</em> description on &#8216;Waterfall&#8217; from 1970. Surprise &#8211; it is really really close to agile. This is a great read. Hopefully, this will end a lot of the debates on terminology and focus on the specifics of &#8216;good process&#8217;.</p>

<p><a href="http://polishinggems.blogspot.com/2011/07/why-is-waterfall-model-bad.html " title="Why is Waterfall Model Bad?">http://polishinggems.blogspot.com/2011/07/why-is-waterfall-model-bad.html
</a></p>

<p>The second key point that is seen here is on how information is transferred from generation to generation. People may think that because technical people are well&#8230; technical that they are always assured of using the best practices. The truth is that this is a universal human problem.</p>

<p>The good news is that this is solvable. The mistakes are getting recognized faster. I don&#8217;t have any specific data other than my own experience, but I think I can make a strong case.</p>

<p>In the 80&#8217;s when I needed to see some code or a paper, it just wasn&#8217;t possible. There was no way for me to get that journal that cost a lot of money or attend the conference that sponsored it. There was no way for me to spend a thousand dollars on the original berkeley unix tapes (which was at cost), and on top of that have a $10,000 9-track tape reader to get the data off of it. This was general, very few people had great access.</p>

<p>If you heard &#8216;such and such&#8217; can solve the Y problem, and you trusted that person, that was probably good enough.</p>

<p>Today, we have wikipedia and more and more stuff is &#8216;online&#8217;. This entire problem goes away. For example, I was once interested in a particular Smalltalk technology. In the past I just didn&#8217;t have access to the technology. Once the internet made it available, I downloaded the implementation, tried it out, and found it to be very similar to another tech in another language. This took less than an hour. The interesting thing here is that I would talk about this tech to others with amazement. I would think of this tech as a &#8220;silver bullet&#8221; and talk about as the &#8216;most impressive thing&#8217;. Do you see the failing here?</p>

<p>Another great example is around &#8216;quotes&#8217;. For example, most people know Stewart Brand&#8217;s quotation that &#8216;information wants to be free&#8217;. That alone is an interesting meme. Yet, the full context is much more valuable and relevant:</p>

<p><a href="http://en.wikipedia.org/wiki/Information_wants_to_be_free" title="Information Wants To Be Free">http://en.wikipedia.org/wiki/Information<em>wants</em>to<em>be</em>free
</a></p>

<p>(yes, I just used recursion, not intentional)</p>

<p>If access to good information continues to happen, I think new structures will emerge around information that have not existed before. These structures will allow us to be a bit more knowledgable about the &#8216;why&#8217; of something vs. just indoctrinating systems.</p>

<p>Thank you internet.</p>
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		<item>
		<title>Neat Chart on Schumpeter Cycles</title>
		<link>http://xxeo.com/archives/2012/08/16/neat-chart-on-schumpeter-cycles.html</link>
				<pubDate>Thu, 16 Aug 2012 22:07:25 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1120</guid>
				<description><![CDATA[Click to enlarge the chart. Pretty interesting chart. When I was old enough to be seriously looking for work, it was right around the 1990 low. It was a pretty tough time to find interesting work. You can read more &#8230; <a href="http://xxeo.com/archives/2012/08/16/neat-chart-on-schumpeter-cycles.html">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
								<content:encoded><![CDATA[<p><a href="http://www.xxeo.com/content/uploads/2012/08/schumpeter1.gif"><img class="alignnone size-medium wp-image-1121" title="schumpeter1" src="http://www.xxeo.com/content/uploads/2012/08/schumpeter1-300x80.gif" alt="schumpeter cycles" width="300" height="80" srcset="http://xxeo.com/content/uploads/2012/08/schumpeter1-300x80.gif 300w, http://xxeo.com/content/uploads/2012/08/schumpeter1.gif 800w" sizes="(max-width: 300px) 100vw, 300px" /></a></p>

<p>Click to enlarge the chart. Pretty interesting chart.</p>

<p>When I was old enough to be seriously looking for work, it was right around the 1990 low. It was a pretty tough time to find interesting work.</p>

<p>You can read more about <a title="Joseph Schumpeter on Wikipedia" href="http://en.wikipedia.org/wiki/Joseph_Schumpeter">Joseph Schumpeter on Wikipedia</a>.</p>
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		<item>
		<title>Xerox Alto / Star UI</title>
		<link>http://xxeo.com/archives/2012/06/19/xerox-alto-star-ui.html</link>
				<pubDate>Tue, 19 Jun 2012 20:21:37 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1057</guid>
				<description><![CDATA[This is a screenshot of the Xerox STAR system from 1984. If you compare it to a desktop today, not much has changed. Most of the concepts have held up really well. What a testament to the team at PARC &#8230; <a href="http://xxeo.com/archives/2012/06/19/xerox-alto-star-ui.html">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
								<content:encoded><![CDATA[<p><a href="http://www.xxeo.com/content/uploads/2012/06/starbitmap2.gif"><img class="alignnone size-medium wp-image-1058" title="starbitmap2" src="http://www.xxeo.com/content/uploads/2012/06/starbitmap2-300x236.gif" alt="Xerox STAR Alto" width="300" height="236" srcset="http://xxeo.com/content/uploads/2012/06/starbitmap2-300x236.gif 300w, http://xxeo.com/content/uploads/2012/06/starbitmap2.gif 1023w" sizes="(max-width: 300px) 100vw, 300px" /></a></p>

<p>This is a screenshot of the Xerox STAR system from 1984. If you compare it to a desktop today, not much has changed. Most of the concepts have held up really well. What a testament to the team at PARC that inspired and designed most of this.</p>
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		<item>
		<title>More old school : DEC VT330 terminal</title>
		<link>http://xxeo.com/archives/2012/06/15/more-old-school-dec-vt330-terminal.html</link>
				<pubDate>Fri, 15 Jun 2012 22:46:39 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1051</guid>
				<description><![CDATA[We have come a long way. I still had to use systems like this in the early 90s. Interesting. Even today, if I asked an eng candidate to make this plot, many would have a very very hard time.]]></description>
								<content:encoded><![CDATA[<p>We have come a long way. I still had to use systems like this in the early 90s.</p>

<iframe width="560" height="315" src="http://www.youtube.com/embed/Dmrmj5y72kg" frameborder="0" allowfullscreen=""></iframe>

<p>Interesting. Even today, if I asked an eng candidate to make this plot, many would have a very very hard time.</p>
]]></content:encoded>
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		<item>
		<title>Old School DEC terminal</title>
		<link>http://xxeo.com/archives/2012/06/14/old-school-dec-terminal.html</link>
				<pubDate>Thu, 14 Jun 2012 23:11:01 +0000</pubDate>
		<dc:creator><![CDATA[xxeo]]></dc:creator>
				<category><![CDATA[General]]></category>

		<guid isPermaLink="false">http://www.xxeo.com/?p=1048</guid>
				<description><![CDATA[&#160; Old School DEC VT05 Terminal. Neat design.]]></description>
								<content:encoded><![CDATA[<p><a href="http://www.xxeo.com/content/uploads/2012/06/0.jpeg"><img class="alignnone size-medium wp-image-1049" title="VT05" src="http://www.xxeo.com/content/uploads/2012/06/0-300x225.jpeg" alt="" width="300" height="225" srcset="http://xxeo.com/content/uploads/2012/06/0-300x225.jpeg 300w, http://xxeo.com/content/uploads/2012/06/0.jpeg 480w" sizes="(max-width: 300px) 100vw, 300px" /></a></p>

<p>&nbsp;</p>

<p>Old School DEC VT05 Terminal. Neat design.</p>
]]></content:encoded>
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