Definitions of terms related to information technology and computer and internet in simple language.noreply@blogger.com (Akash)Tue, 5 Nov 2024 18:59:20 -0800Blogger http://www.blogger.com641100http://www.defit.org/en-usnoDefinitions of terms related to information technology and computer and internet in simple language.noreply@blogger.comhttp://www.defit.org/2013/11/dpi.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Fri, 1 Nov 2013 07:10:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-8941733988105053479Dots per inch (DPI) is a measure of image printing resolution. In printing, DPI refers to the output resolution of a printer. DPI definition Dots per inch is a measure of printing or display screen dot density which denotes the number of individual dots that can be placed in a line within the area of 1 inch (2.54 cm). The term pixels per inch (PPI) is preferred as a measure of display screen http://www.defit.org/2013/11/bistable-devices.htmlHardwarenoreply@blogger.com (Akash)Fri, 1 Nov 2013 06:07:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-2128974582456552989A bi-stable device is a device that is like a switch because it can be in only two possible stable states. Bistable devices follow the principle of bistability and are foundation of digital electronics. Bistable device definition A bistable device is a device that can be either in one of the two possible states such as on or off, pulse or no pulse, 0 or 1. Transistors, flip-flop and organic http://www.defit.org/2013/07/ocr.htmlComputer ScienceHardwareSoftwarenoreply@blogger.com (Akash)Sun, 7 Jul 2013 04:43:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-89542792216533692Optical character recognition (OCR) is a technology used to overcome the drawbacks of a simple scanner. When any printed document is scanned with the help of OCR, the resultant electronic file will not be in image form but in a form of editable text (ASCII codes). The resultant text can be edited by normal word processors. Optical character recognition definition Optical character recognition ishttp://www.defit.org/2013/07/image-scanner.htmlHardwarenoreply@blogger.com (Akash)Fri, 5 Jul 2013 04:19:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-4643369446600050068Image scanner or optical scanner is a type of scanner that generates a digital representation of an image for data input to a computer. Image scanner definition An image scanner (often abbreviated to just scanner) is an electronic device which can read or scan graphics, text or handwritten document and translate it into an electronic format that the computer can understand. Types of Image http://www.defit.org/2013/07/scanner.htmlHardwareSoftwarenoreply@blogger.com (Akash)Wed, 3 Jul 2013 22:07:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-8124442747577569254A scanner is a hardware device or a software or combination of both used for examining, reading, searching or monitoring something. Most of the scanners uses light, radiation, ultrasound, or magnetic resonance imaging, as a diagnostic aid. Note: Don't get confused with image scanners which converts an image hard copy into digital soft copy. In computing, image scanners are often abbreviated to http://www.defit.org/2013/07/barcode.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Tue, 2 Jul 2013 03:06:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-4811249130367013314Bar-codes are used for automatic identification and data collection. A barcode sticker contains representation of data relating to the product to which it is attached. Bar code definition Barcode is a machine-readable code in the form of numbers and a group of parallel lines with varying width and spacing which is generally used for identifying a product. Barcodes are generally scanned by a http://www.defit.org/2013/06/micr.htmlHardwarenoreply@blogger.com (Akash)Sat, 29 Jun 2013 04:16:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-7213358230225609999Magnetic ink character recognition (MICR) is a character recognition system that uses special ink and characters. MICR technology is generally used by banks to facilitate the processing and clearance of cheques. MICR definition Magnetic ink character recognition is a technology used to verify the legitimacy or originality of paper documents using special ink which is sensitive to magnetic fieldshttp://www.defit.org/2013/06/barcode-reader.htmlHardwarenoreply@blogger.com (Akash)Fri, 28 Jun 2013 02:41:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-6724200271912642501Bar-code readers, price scanner, point-of-sale (POS) scanner or barcode scanners are generally found in supermarkets and large departmental stores. It is a type of scanner which is used for reading printed barcodes. BarCode Reader (BCR) definition A barcode reader is a hand-held or stationary input device used to capture and read information contained in a barcode. A bar-code reader consists ofhttp://www.defit.org/2013/06/pixels.htmlComputer ScienceHardwareIT and Miscellaneousnoreply@blogger.com (Akash)Thu, 6 Jun 2013 04:49:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-8732428819332033004Pixels or pels (picture elements) in digital imaging are small little dots that make up the images. Pixel is the basic unit or smallest element a of programmable color in a digital image. Pixels definition Pixel is a single point of illumination on a digital display screen. Collection of several pixels make up the images on digital display screens such as a computer monitor. A digital screen ishttp://www.defit.org/2013/06/shell.htmlComputer ScienceSoftwarenoreply@blogger.com (Akash)Wed, 5 Jun 2013 04:28:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-3810920002210148036The shell or command shell is a software program that provides direct communication between the user and the operating system. The term shell is also rarely applied to a software that is built around a particular component or for a software that provides a user interface for another program. Shell definition A shell is software that provides an interface between users and operating system of a http://www.defit.org/2013/06/prototype.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Mon, 3 Jun 2013 21:19:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-5593822301946088585Prototype is a basic or preliminary model of something, from which other forms are developed or imitated. The word prototype is derived from the Greek word prototypon, which means "primitive form". Prototype definition (noun) A prototype is an early working model built to test a concept, a process or a product which acts as a thing to be replicated, learned or further developed. Prototype http://www.defit.org/2013/06/model.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Sun, 2 Jun 2013 22:10:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-3756899236406517747Model is a representation of a system that allows for investigation of the properties of the system and, in some cases, prediction of future outcomes. Model definition A model is a representation of a system which abstracts certain features but ignores surplus features. A first or preliminary model of something is called a prototype. A process model or life cycle model of a software product ishttp://www.defit.org/2013/06/modular-programming.htmlProgrammingnoreply@blogger.com (Akash)Sun, 2 Jun 2013 21:30:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-5924035313195138575Modular programming also called as stepwise refinement or top-down design is a programming approach that breaks down program functions into modules. Modular programming definition Modular programming is a technique of developing software by separating the functionality of a program into independent, interchangeable modules that are combined together to get the final working software. http://www.defit.org/2013/03/multimedia.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Fri, 1 Mar 2013 04:16:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-8194814603616717177Multimedia is the usage of more than one medium of communication. We can find usage of multimedia in almost all fields today. Multimedia definition Multimedia is a combination of text, photographs, graphics, sound, video and animation which is developed and presented through an electronic medium. Multimedia offers a wide variety of ways of presenting content through computers and/or http://www.defit.org/2012/11/website.htmlInternetnoreply@blogger.com (Akash)Mon, 12 Nov 2012 20:29:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-1918041640061748015Website is a collection of interlinked web pages. A web site or simply site is hosted on a web server or on multiple web servers. A web site is accessible via the Internet or other computer networks. A website is identified uniquely by an address known as a Uniform Resource Locator. Website definition A website is a collection of related files on the World Wide Web that includes a beginning filehttp://www.defit.org/2012/08/webpage.htmlInternetnoreply@blogger.com (Akash)Sun, 12 Aug 2012 20:36:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-9059040700522895183Webpage is the building unit of a website. Web page is a document on the internet which is identified by a unique URL (Uniform Resource Locator). Webpage definition A webpage is a document or information resource on the World Wide Web which can be accessed using a web browser. A webpage is usually in HTML or XHTML format, and it may include elements like text, images, animation, style http://www.defit.org/2012/08/world-wide-web.htmlInternetNetworkingnoreply@blogger.com (Akash)Sun, 12 Aug 2012 00:52:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-1684352419169543208The World Wide Web(WWW) also commonly called "Web" or "W3" is a system of network-accessible information. The World Wide Web began as a networked information project at CERN, where Tim Berners-Lee a computer scientist and founder of World Wide Web Consortium (W3C), developed a vision of the project. WWW definition The World Wide Web is a system of interlinked hypertext documents accessed via http://www.defit.org/2012/08/decryption.htmlComputer Sciencenoreply@blogger.com (Akash)Sat, 11 Aug 2012 21:38:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-926476018809906862Decryption is generally the reverse process of encryption. It is the process of decoding the data which has been encrypted into a secret format. An authorized user can only decrypt data because decryption requires a secret key or password. Decryption definition Decryption is the process of decoding encrypted information so that is can be accessed again by authorized users. Encryption - http://www.defit.org/2012/07/encryption.htmlComputer Sciencenoreply@blogger.com (Akash)Wed, 11 Jul 2012 20:20:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-8744701529979275903Encryption is a process in which information is converted into a form which cannot be understood by unauthorized user. Encrypted data cannot be read or understood by anyone except those possessing special key which works like password. The result of the encryption process i.e. encrypted information is referred to as cipher-text in cryptography. Generally encryption is used to make confidential orhttp://www.defit.org/2012/06/artificial-intelligence.htmlComputer Sciencenoreply@blogger.com (Akash)Thu, 21 Jun 2012 07:31:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-4407545501688016070Artificial Intelligence abbreviated as AI, is the branch of computer science concerned with making machines intelligent. Artificial intelligence can be used in a wide range of fields including education, medical diagnosis, robot control, computer games, law, scientific discovery, stock trading etc. It is difficult to give a solid definition of AI as it cannot be characterized in general that http://www.defit.org/2012/06/module.htmlHardwareIT and MiscellaneousProgrammingSoftwarenoreply@blogger.com (Akash)Sun, 17 Jun 2012 07:44:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-1215702926940771150In software engineering, a module is a part of a program. Programs are composed of one or more independently developed modules that are combined when the program is linked. Module definition Module is an independent separable component or part of a system(software or hardware). Characteristics of module Few fundamental features of a module are as follows: Self-Contained Highly Cohesive Loose http://www.defit.org/2012/06/google.htmlInternetnoreply@blogger.com (Akash)Fri, 15 Jun 2012 06:27:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-6043419125854751442Google is the most famous search engine. Larry Page and Sergey Brin are the founders of Google. Initially a search engine, Google now provides a variety of Internet based services. Google (noun) Google Inc. is an multinational company which provides Internet-related products and services, including web search, cloud computing, software etc. Google (verb) To search a term on a search enginehttp://www.defit.org/2012/06/schema.htmlComputer Sciencenoreply@blogger.com (Akash)Thu, 14 Jun 2012 07:19:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-2941769723655514889Schema is a representation of a plan or theory in the form of a diagram, rules or model. The word schema (Both schemata and schemas are used as plural forms) is derived from the Greek word skhēma, which means a plan or figure. Schema definition Schema is an outline, protocol or a model used to represent a structure, semantics or a plan. In computer science, the word "schema" may refer to: http://www.defit.org/2012/06/blog.htmlInternetnoreply@blogger.com (Akash)Wed, 13 Jun 2012 03:31:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-640484505742364062A blog or weblog is a kind of website published on the World Wide Web which is updated regularly. An article published on blog is called a post. Generally the homepage of blog consists of posts or links to these posts which are typically displayed in order such that the most recent post appears first. Blogs are updated and maintained by a single individual called blogger or a group of bloggers. http://www.defit.org/2012/06/modularity.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Tue, 12 Jun 2012 03:31:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-7091295621459024378Modularity is a frequently used term in information technology and computer science. Modularity refers to the concept of making multiple modules first and then linking and combining them to form a complete system. Modularity enables re-usability and minimizes duplication. In addition to re-usability, modularity also makes it easier to fix problems as bugs can be traced to specific system modules,http://www.defit.org/2012/06/message-passing.htmlComputer ScienceProgrammingnoreply@blogger.com (Akash)Sun, 10 Jun 2012 21:25:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-4591120187542855148Message passing is a type of communication between processes or objects in computer science. In this model, processes or objects can send and receive messages (signals, functions, complex data structures, or data packets) to other processes or objects. Message passing definition Message passing is a form of communication between objects, processes or other resources used in object-oriented http://www.defit.org/2012/06/data-redundancy.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Fri, 8 Jun 2012 06:17:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-1575070567333667267Data redundancy is the repetition or superfluity of data. Data redundancy data is an common issue in computer data storage and database systems. Data redundancy definition Data redundancy in database means that some data fields are repeated in the database. This data repetition may occur either if a field is repeated in two or more tables or if the field is repeated within the table. Data can http://www.defit.org/2012/06/data-abstraction.htmlProgrammingnoreply@blogger.com (Akash)Fri, 1 Jun 2012 20:35:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-2828680861043983347The concept of representing important details and hiding away the implementation details is called data abstraction. This programming technique separates the interface and implementation. Data abstraction is also an OOP feature.Abstraction tries to minimize details so that the programmer can focus on a few concepts at a time. Abstraction is the basis for software development.Data abstraction http://www.defit.org/2012/05/julian-date.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Mon, 28 May 2012 00:16:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-2806299580010707034A Julian date(JD) is the elapsed time in days and fractions of a day since January 1, 4713 BC Greenwich noon. The purpose of the Julian date is to make it easy for computing difference between one calendar date and another calendar date.A Julian date for a certain time of day on May 28, 2012 looks like this:2456075.74082Here, 2456075 is the number of days elapsed since the beginning of the Julianhttp://www.defit.org/2012/04/gui.htmlComputer Sciencenoreply@blogger.com (Akash)Sun, 22 Apr 2012 08:05:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-5225831274258466040A graphical user interface is a human-computer interface that is graphical (rather than purely textual) user interface. GUI uses images, window, icons, buttons, menus etc. which can be manipulated by a mouse.GUI are more user friendly than command line interface(CLI) as user interacts by using a mouse rather than by having to type in commands. Also users don't have to remember lot of commands andhttp://www.defit.org/2012/04/command-line-interface.htmlComputer Sciencenoreply@blogger.com (Akash)Sun, 22 Apr 2012 05:51:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-8677456206604462551A command-line interface (CLI) is an interface between the user and a program. GUI was not supported by early operating system and text-based commands were used for communication between user and the computer.CLI system does not have mouse as an input device and generally keyboard is used for input where the messages are sent by typing a command and then by pressing the enter(return) key. After ahttp://www.defit.org/2012/04/inheritance.htmlProgrammingnoreply@blogger.com (Akash)Sat, 21 Apr 2012 06:10:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-7812848867577536638Inheritance in programming languages is a concept of OOP which supports hierarchical classification and reusability of code. A class is derived from another class and it shares common characteristics with the class from which it is derived.Derived class is also known as child class or subclass and the class from which it is derived is called base class or parent class or ancestor class or super http://www.defit.org/2012/04/dynamic-binding.htmlProgrammingnoreply@blogger.com (Akash)Thu, 19 Apr 2012 07:05:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-7439372792240842982Dynamic binding also called dynamic dispatch is the process of linking procedure call to a specific sequence of code (method) at run-time. It means that the code to be executed for a specific procedure call is not known until run-time. Dynamic binding is also known as late binding or run-time binding. Dynamic binding is an object oriented programming concept and it is related with polymorphism http://www.defit.org/2012/03/information-technology.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Sat, 24 Mar 2012 06:14:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-6495257730573313924Information technology (abbreviated as IT) is nothing but technology related with information. I.T. has wide variety of areas that include but are not limited to things such as processes, computer software, information systems, computer hardware, programming languages, and data structures. In short, anything that renders data, information or perceived knowledge in any visual format whatsoever, http://www.defit.org/2012/03/technology.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Sat, 24 Mar 2012 05:03:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-4403668391498124538Technology is a broad concept which in simple words can be defined as the application of scientific knowledge to solve a problem or perform a specific function. The word technology comes from Greek word "technología". The greek word "technología" itself is a combination of other two greek words, "techne" which means art, skill or craft and "logía" which means study of.Generally, a technology http://www.defit.org/2012/03/process.htmlComputer Sciencenoreply@blogger.com (Akash)Tue, 20 Mar 2012 05:41:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-4613705717239692342Process is a series or steps of actions. Process can be referred to an action being executed or it can also refer to sequence of interdependent and linked procedures which consumes some resources to convert inputs into outputs. These are the standard definitions which are widely accepted but the meaning may change in the field of computing. In fact, meaning of process differs according to contexthttp://www.defit.org/2012/03/uml.htmlIT and MiscellaneousProgrammingnoreply@blogger.com (Akash)Tue, 20 Mar 2012 04:55:00 -0700tag:blogger.com,1999:blog-7799755568903562473.post-7648241368408243445UML(Unified Modeling Language) is a modeling language which helps to simplify the process of software design. UML includes a flexible graphical notification to create visual models of basically object-oriented software systems. The UML was created by Grady Booch, Ivar Jacobson and James Rumbaugh of the Object Management Group. Each symbol in the UML notation has well-defined semantics. UML is http://www.defit.org/2012/03/data-structures.htmlComputer ScienceIT and Miscellaneousnoreply@blogger.com (Akash)Sun, 4 Mar 2012 20:45:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-8252193608820015380In a computer, we need a proper system of storing and retrieval of data. Such system is called data structure. Data structures provide a means to maintain and manipulate large amount of data efficiently. Data structures are used in almost every program or software for manipulation of data. Manipulation of data requires the following tasks: Storing of data Transformation of data(Various http://www.defit.org/2012/02/polymorphism.htmlProgrammingnoreply@blogger.com (Akash)Sat, 18 Feb 2012 05:51:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-2658441364459520534Polymorphism means having one name and many forms or shape. The term polymorphism comes from Greek roots. In Greek "poly" means many and "morphe" means form. Polymorphism definition Polymorphism is the ability to take more than one form. There are two types of polymorphism: Compile time(Static) polymorphism Run time(Dynamic) polymorphism Compile time polymorphism is achieved through function http://www.defit.org/2012/02/information-hiding.htmlProgrammingnoreply@blogger.com (Akash)Fri, 17 Feb 2012 04:39:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-700407931766714615Information hiding or data hiding in programming is about protecting data or information from any inadvertent change throughout the program. Information hiding is a powerful OOP feature. Information hiding is closely associated with encapsulation. Information hiding definition Information or data hiding is a programming concept which protects the data from direct modification by other parts of http://www.defit.org/2012/02/encapsulation.htmlProgrammingnoreply@blogger.com (Akash)Fri, 17 Feb 2012 03:12:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-6669022222499493894Encapsulation is packing or combining two or more items in one unit. The concept of encapsulation is used in object oriented programming. Encapsulation is closely related to information hiding. Encapsulation definition The bundling of data and procedures(functions) into a single unit(called class) is known as encapsulation. Class is an example of encapsulation, where various data elements andhttp://www.defit.org/2012/02/class.htmlProgrammingnoreply@blogger.com (Akash)Mon, 6 Feb 2012 23:39:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-863460554177853102Classes in programming languages are user defined data types. But they behave like built-in data types. Classes are used in object oriented programming paradigm. Class definition Class is a collection of objects of similar type or Class is a construct which can be used as a template to create instances of itself known as class objects. Example of a class in C++ : class person { private: http://www.defit.org/2012/02/objects.htmlProgrammingnoreply@blogger.com (Akash)Mon, 6 Feb 2012 21:41:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-8258864426554392856Anything that can be seen or touched is an object. Objects are everywhere around you. They may represent a book, your computer, a place, a person or any item that the program has to deal with. Objects are often used in object oriented programming. Objects are basic elements in an object-oriented system. They are also known as class instances, class objects or instance objects. Object definition http://www.defit.org/2012/02/object-oriented-programming-oop.htmlProgrammingnoreply@blogger.com (Akash)Mon, 6 Feb 2012 20:52:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-4096239046744817648Object oriented programming is a type of programming paradigm which is abbreviated as OOP. This approach of programming removes the limitations of procedural oriented programming. OOP treats data as an important element and does not allow it to flow freely around the program. Here basic entities called objects are used as data-structures that consists of both data and procedures. Object orientedhttp://www.defit.org/2012/02/programming-software.htmlProgrammingSoftwarenoreply@blogger.com (Akash)Thu, 2 Feb 2012 18:37:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-5374632423928223434Programming software is a software which helps the programmer in developing other software. Compilers, assemblers, debuggers, interpreters etc. are examples of programming software. Integrated development environments (IDEs) are combinations of all these software. Programming software is also known as programming tool or software development tool. Programming software definition Programming http://www.defit.org/2012/01/system-software.htmlSoftwarenoreply@blogger.com (Akash)Mon, 30 Jan 2012 19:08:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-2516979803314963838System software makes the computer system available for use. It manages the computer resources. It runs at the most basic level of computer and thus it is called "low-level" software. It is one of the two categories of software. The other one is application software. System software definition System software is computer software which is used to control and coordinate the computer hardware and http://www.defit.org/2012/01/application-software.htmlSoftwarenoreply@blogger.com (Akash)Fri, 27 Jan 2012 07:27:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-3099694468198787936Application software is a term which is used for software created for a specific purpose. It is generally a program or collection of programs used by end users. It can be called an application or simply an app. In fact all the software other than system software and programming software are application software. Application software definition A software which is developed to help the user to http://www.defit.org/2012/01/data-type.htmlIT and MiscellaneousProgrammingnoreply@blogger.com (Akash)Fri, 13 Jan 2012 02:56:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-4131284285598673560Data type refers to the kind of data. The data type in programming, refers to what kind of data a variable or a programming element can hold and how that data is stored. Data type is used for classification and differentiation of various types of data. Data type definition Data type is the data storage format that contains similar type of values or set of values. Almost all programming http://www.defit.org/2012/01/information.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Wed, 11 Jan 2012 04:59:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-3358470804803469502Information is processed data. Information is the message or expression being conveyed. Information is data presented in way which conveys a specific meaning and is relevant. Technology related with information is called information technology. Information definition Information is the data that has been transformed into output(that is valuable to users) by performing some operation on it. In http://www.defit.org/2012/01/data.htmlIT and Miscellaneousnoreply@blogger.com (Akash)Tue, 10 Jan 2012 04:34:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-3876483745020981983Data is a raw fact. Data is the plural of datum, however people prefer to use the term 'data' for both singular and plural form. Data can be converted into information by performing various operations on it as per the requirement. Computer programs are used to analyse and process data. Data definition Data are facts or statistics which can be of qualitative or quantitative nature. In other http://www.defit.org/2012/01/software.htmlSoftwarenoreply@blogger.com (Akash)Tue, 10 Jan 2012 02:33:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-9059180294152242678Software instructs computer to perform specific tasks. It can be a single program or collection of programs. Software has a wide meaning and anything that is stored electronically can be called software. Unlike hardware, we cannot touch software. Without software, computer is useless. Software tells the computer what to do and how to do it. Software definition Software is a collection of http://www.defit.org/2012/01/program.htmlProgrammingnoreply@blogger.com (Akash)Mon, 9 Jan 2012 23:33:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-6881231991055349089Without a program, computer is useless. Program is nothing but a list of instructions which are written by a computer programmer. Execution of such program by CPU causes the computer to behave in a predetermined manner. The act of writing a program is called programming. The program's code is first written in a programming language. Source code of a program is in human-readable form which cannot http://www.defit.org/2012/01/rom.htmlHardwarenoreply@blogger.com (Akash)Mon, 9 Jan 2012 21:35:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-8068497968845466973ROM (Read-Only Memory) is a computer memory on which data can be recorded only once. Once data has been written on ROM, it cannot be deleted but can be read as many times as required. ROM mainly contains firmware software which is generally prerecorded by the manufacturing company. ROM definition Read Only Memory (ROM) is computer memory that permanently stores data and programs. These programs http://www.defit.org/2012/01/ram.htmlHardwarenoreply@blogger.com (Akash)Mon, 9 Jan 2012 18:54:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-983418477189644786RAM is a type of computer memory. It stands for Random Access Memory. It is often called primary memory or main memory of a computer. It is the most common type of memory found in computers and other electronic gadgets and devices like smart-phones, printers, tablets etc. It is a type of memory which can be accessed randomly and thus is is know as random access memory. Though several modern typeshttp://www.defit.org/2012/01/network-topology.htmlNetworkingnoreply@blogger.com (Akash)Sun, 8 Jan 2012 01:37:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-4795798036146000173The term topology in computer field means the way in which the computers in a network are inter-connected. Network topology definitions The pattern in which the computers or various hardware elements are connected in a computer network(mostly LAN) is called a network topology. The network topologies can be physical or logical. Physical topology refers to the physical shape or design structure http://www.defit.org/2011/11/computer-network.htmlNetworkingnoreply@blogger.com (Akash)Thu, 24 Nov 2011 04:10:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-5649978078139868847The purpose of a computer network is to create a link between multiple computer systems and support communication between them. Computers in a network can share data with each other. Various types of topologies like Bus, Star, Ring, Hierarchical, Hybrid etc. are used in computer networks. Computer network definition The interconnection of computers and various hardware components through cables http://www.defit.org/2011/11/who-is-blogger.htmlInternetWho isnoreply@blogger.com (Akash)Wed, 23 Nov 2011 22:26:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-2382073165824908559Generally a writer who posts his work regularly on a website is called a blogger. Blogger definition A person who writes a blog (also called weblog) or a person who is contributor to a blog is called a blogger. The act of writing a blog is called blogging. Blogging has now become a profession. Many people are full time bloggers and enjoy making money online through affiliates and http://www.defit.org/2011/11/programming.htmlComputer ScienceProgrammingnoreply@blogger.com (Akash)Wed, 23 Nov 2011 03:48:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-6145410333522321940Computer Programming is the process or action of planning and writing the code of a computer program. Generally a person called programmer performs this action. The purpose of programming is to create a program that performs specific operations or tasks. Programming definition The process of planning, flow-charting, designing, writing, debugging, testing and maintaining the source code of http://www.defit.org/2011/11/url.htmlInternetnoreply@blogger.com (Akash)Wed, 23 Nov 2011 03:09:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-4676899768841800577URL (Uniform / Universal Resource Locator) is a string which suggests where can be a file found on the internet. It is thus a reference or an address of a WWW (World Wide Web) resource. The URL contains the protocol prefix, port number, domain name, sub directory name and file name. URL definition URL (Uniform / Universal Resource Locator) is the address which defines the route or path to a filehttp://www.defit.org/2011/11/who-is-geek-nerd-definition.htmlWho isnoreply@blogger.com (Akash)Tue, 22 Nov 2011 22:55:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-5593113654273732293According to dictionary a person who is foolish, unfashionable, single minded or clumsy is called a geek or a nerd, but in fact the meaning of geek has changed with time. The words geek and nerd are slang terms, which has different meanings. Nowadays these terms are generally used to mention a technical person or a computer expert. Geek(Nerd) definition A person who has devotion to a particular http://www.defit.org/2011/11/definition-of-internet.htmlInternetNetworkingnoreply@blogger.com (Akash)Tue, 22 Nov 2011 20:44:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-4396399139445410138Internet is nothing else than a big computer network. It is a computer network which is spread all over the world. We can also say that it is a network of networks. This means that it is a network which connects many other small networks and also individual computer systems. Internet definition The Internet is a global system of interconnected computer networks which is accessible to the generalhttp://www.defit.org/2011/11/what-is-operating-system-os.htmlSoftwarenoreply@blogger.com (Akash)Tue, 22 Nov 2011 20:16:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-3834490327905686346An operating system (OS) is a software which manages all the hardware and software components of a computer system. Operating system is a system software and it is the most important software in a computer system. We can define operating system as: Operating system definition Operating system is a software which consists of programs and data used to manage the computer hardware resources and http://www.defit.org/2011/11/computer-hardware-definition.htmlHardwarenoreply@blogger.com (Conjurers)Tue, 22 Nov 2011 04:02:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-417617275040374161 Hardware is a term which is generally used to describe the components which we can see and touch. We can elaborately define computer hardware as follows: Hardware definition All the physical components or parts of a computer system, information system or any other electronic system is called hardware. Examples of Hardware: Motherboard, Keyboard, RAM, MODEM, Monitor etc.http://www.defit.org/2011/11/computers-what-is-digital-computer.htmlComputer Sciencenoreply@blogger.com (Akash)Mon, 21 Nov 2011 03:11:00 -0800tag:blogger.com,1999:blog-7799755568903562473.post-5680499425138357936In simple terms, computer is a machine which can perform arithmetic or logical operations.The word "Computer" comes from compute. Compute means "to calculate" and this term "compute" comes from Latin word "computare". Computer definition Computer is an electronic machine which takes data as input, processes it and gives information as output. Digital computer definition A computer that