HTML Tutorial Computer science Computer science deals with the theoretical foundations of information and computation, together with practical techniques for the implementation and application of these foundations History[edit] The earliest foundations of what would become computer science predate the invention of the modern digital computer. Machines for calculating fixed numerical tasks such as the abacus have existed since antiquity, aiding in computations such as multiplication and division. Further, algorithms for performing computations have existed since antiquity, even before sophisticated computing equipment were created. Blaise Pascal designed and constructed the first working mechanical calculator, Pascal's calculator, in 1642.[3] In 1673 Gottfried Leibniz demonstrated a digital mechanical calculator, called the 'Stepped Reckoner'.[4] He may be considered the first computer scientist and information theorist, for, among other reasons, documenting the binary number system. Contributions[edit] Philosophy[edit]
Cascading Style Sheets What is CSS? Cascading Style Sheets (CSS) is a simple mechanism for adding style (e.g., fonts, colors, spacing) to Web documents. These pages contain information on how to learn and use CSS and on available software. Software Nearly all browsers nowadays support CSS and many other applications do, too. Of course, all software has bugs, even after several updates. More » Learning CSS For beginners, Starting with HTML + CSS teaches how to create a style sheet. Another page also has some books, mailing lists and similar fora, and links to other directories. The history of CSS is described in chapter 20 of the book Cascading Style Sheets, designing for the Web, by Håkon Wium Lie and Bert Bos (2nd ed., 1999, Addison Wesley, ISBN 0-201-59625-3) More »
JavaScript JavaScript is classified as a prototype-based scripting language with dynamic typing and first-class functions. This mix of features makes it a multi-paradigm language, supporting object-oriented,[6] imperative, and functional[1][7] programming styles. JavaScript has been standardized in the ECMAScript language specification. History[edit] Beginnings at Netscape[edit] JavaScript was originally developed by Brendan Eich, while working for Netscape Communications Corporation. Although it was developed under the name Mocha, the language was officially called LiveScript when it first shipped in beta releases of Netscape Navigator 2.0 in September 1995, but it was renamed JavaScript[10] when it was deployed in the Netscape browser version 2.0B3.[11] The change of name from LiveScript to JavaScript roughly coincided with Netscape adding support for Java technology in its Netscape Navigator web browser. Server-side JavaScript[edit] Adoption by Microsoft[edit] Standardization[edit] Trademark[edit]
Category:Image processing Image processing is the application of signal processing techniques to the domain of images — two-dimensional signals such as photographs or video. Image processing does typically involve filtering an image using various types of filters. Related categories: computer vision and imaging. Subcategories This category has the following 13 subcategories, out of 13 total. Pages in category "Image processing" The following 200 pages are in this category, out of 213 total. (previous 200) (next 200)(previous 200) (next 200) jQuery JavaScript: The World's Most Misunderstood Programming Language Douglas Crockford www.crockford.com JavaScript, aka Mocha, aka LiveScript, aka JScript, aka ECMAScript, is one of the world's most popular programming languages. Virtually every personal computer in the world has at least one JavaScript interpreter installed on it and in active use. JavaScript's popularity is due entirely to its role as the scripting language of the WWW. Despite its popularity, few know that JavaScript is a very nice dynamic object-oriented general-purpose programming language. The Name The Java- prefix suggests that JavaScript is somehow related to Java, that it is a subset or less capable version of Java. JavaScript has a syntactic similarity to Java, much as Java has to C. JavaScript was not developed at Sun Microsystems, the home of Java. The -Script suffix suggests that it is not a real programming language, that a scripting language is less than a programming language. Lisp in C's Clothing Typecasting JavaScript was designed to run in Netscape Navigator. Moving Target
Data (computing) In an alternate usage, binary files (which are not human-readable) are sometimes called "data" as distinguished from human-readable "text".[4] The total amount of digital data in 2007 was estimated to be 281 billion gigabytes (= 281 exabytes).[5][6] At its heart, a single datum is a value stored at a specific location. To store data bytes in a file, they have to be serialized in a "file format". Typically, programs are stored in special file types, different from those used for other data. Keys in data provide the context for values. Computer main memory or RAM is arranged as an array of "sets of electronic on/off switches" or locations beginning at 0. Data has some inherent features when it is sorted on a key. Retrieving a small subset of data from a much larger set implies searching though the data sequentially. The advent of databases introduced a further layer of abstraction for persistent data storage.
PHP: Hypertext Preprocessor XML.com Getting Started with XML Programming April 21, 1999 If you're new to programming with XML, you may be wondering how to get started. We're going to build a simple text processing application that uses XML to store user preferences and other configuration data. Reading configuration files Many applications need to store user preferences and other sorts of configuration information. Most programmers have probably written code to process text files like this at one time or another. Example 1. [section1] name1=value1 name2=value2 [section2] someothername=someothervalue In this article, I'm going to propose an XML version of the configuration file format (see Example 2), and explore several ways to get information out of files in this format using Perl. A simple configuration file format in XML Example 2 shows a simple XML version of the configuration file shown in Example 1. Example 2. A DTD for this format can be seen in Figure 1. Figure 1. Simplifying assumptions XML files aren't lines of text
Technological singularity The technological singularity is the hypothesis that accelerating progress in technologies will cause a runaway effect wherein artificial intelligence will exceed human intellectual capacity and control, thus radically changing civilization in an event called the singularity.[1] Because the capabilities of such an intelligence may be impossible for a human to comprehend, the technological singularity is an occurrence beyond which events may become unpredictable, unfavorable, or even unfathomable.[2] The first use of the term "singularity" in this context was by mathematician John von Neumann. Proponents of the singularity typically postulate an "intelligence explosion",[5][6] where superintelligences design successive generations of increasingly powerful minds, that might occur very quickly and might not stop until the agent's cognitive abilities greatly surpass that of any human. Basic concepts Superintelligence Non-AI singularity Intelligence explosion Exponential growth Plausibility
The XML Programming Language Click below to go directly to a specific section: History| Significant Language Features| Areas of Application| Sample Programs| Related Links| Printed References| Acknowledgements History XML, which stands for Extensible Markup Language, is a language similar to HTML used for creating arbitrarily-structured documents and web pages. Significant Language Features XML files are written in ASCII text, so the information contained within an XML document is exchangeable between otherwise incompatible systems. The syntax of XML is completely ambiguous and really cannot be standardized. Since it is a text file, it can be viewed in any text editor. Areas of Application XML's biggest area of application is the organization of data within an intranet. Sample Programs An Invoice in XML Related Links World Wide Web Consortium Defines the standards of the World Wide Web. Printed References Leventhal, Michael; Lewis, David; Fuchs, Matthew; (1998). Acknowledgements
AirPort Time Capsule Introduced on January 15, 2008 and released on February 29, 2008, the device has been upgraded several times, matching upgrades in the Extreme series routers. The earliest versions supported 802.11n wireless and came with a 500 GB hard drive in the base model, while the latest model as of 2014[update] features 802.11ac and a 2 TB hard drive. All models include three Ethernet ports and a single USB port. The USB port can be used for external peripheral devices to be shared over the network, such as external hard drives or printers. The NAS functionality utilizes a built-in "server grade" hard drive. §History[edit] The AirPort Time Capsule was introduced at Macworld Conference & Expo on January 15, 2008 and released on February 29, 2008, with pricing announced at US$299 (£199) for the 500 GB version and US$499 (£329) for the 1 TB version. In early 2009, Apple released the second generation Time Capsule. The third generation Time Capsule was released in October 2009. §Features[edit] AirPlay
Learn about Java Technology Java is the foundation for virtually every type of networked application and is the global standard for developing and delivering embedded and mobile applications, games, Web-based content, and enterprise software. With more than 9 million developers worldwide, Java enables you to efficiently develop, deploy and use exciting applications and services. From laptops to datacenters, game consoles to scientific supercomputers, cell phones to the Internet, Java is everywhere! 97% of Enterprise Desktops Run Java89% of Desktops (or Computers) in the U.S. Why Software Developers Choose Java Java has been tested, refined, extended, and proven by a dedicated community of Java developers, architects and enthusiasts. Some Ways Software Developers Learn Java Many colleges and universities offer courses in programming for the Java platform. Young Developers Learn Java Young people are learning programming languages from the earliest ages and up. What Is JavaFX JavaFX is powered by Java. Back to top
by raviii Apr 20