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Thursday 21 April 2011

The Internet, The Web & Electronic Commerce

URL

URL stands for Uniform Resource Locator which specifies where an indentified resource is available and the mechanism for retrieving it. The best- known example of the use of URLs is for the addresses of web pages on the World Wide Web, such as http://www.example.com/.






HTML

HTML ( Hyper text Markup Language) is a predominant markup language for web pages and also is the basic building-blocks of webpages. HTML is written in the form of HTML elements consisting of tags, enclosed in angle brackets (<html>), within the web page content. HTML tags normally come in pairs like <h1> and</h1>. The first tag in a pair is the start tag, the second tag is the end tag( they are also called opening tags and closing tags). In between these tags web designers can add text, tables, images, etc.




Javascript

Javascript is a prototype-based, object-oriented scripting language that is dynamic, weakly typed and has the first class functions. It  is also considered a functional programming language like Scheme and OCaml because it has closures and supports higher order functions.




Applets

An applet is a program written in the Java programming language that can be included in an HTML page, much in the same way an image is included in a page. When you use a Jave technology-enabled brower to view a page that contains an applets, the applet's code is transferred to your system and executed by the brower's Jave Virtual Machine (JVM). For information and examples on how to include an applet in an HTML page, refer to this description of the <APPLET> tag.




Blogs

A blog( a blend of the term web log) is a type of website or part of website. Blogs are usually maintained by an individual with regular entries of commentary, description of events, or other material such as graphics or video.
Entries are commonly displayed in reverse- chronological order. Blog can also be used as a verd, meaning to maintain or add content to a blog.





Wikis

A wiki is a website that allows the creation and editing of ant number of interlinked web pages via a web browser using a simplified markup language or a WYSIWYG text editor. Wikis are typically powered by wiki software and often used to create collaborative works. Examples include community websites, corporate intranets, knowledge management systems, and note services. The software can also used for personal notetaking.



FTP

File Transfer Protocol (FTP) is a standard network protocol used to copy a file from one host to another over a TCP- based network, such as the Internet. FTP is vuilt on a client-server architecture and utilizes separate control and data connections between the client and sever. FTP users may authenticate themselevs using a clear-text sign in protocol but can connect anonymously if the server is configured to allow it.




Plug-in

A plug-in (or plugin) is a set of software components that adds specific abilities to a larger software application. If supported, plug-ins enable customizing the functionally of an application. For example, plug-ins are commomly ysed in web browsers to play video, scan for viruses, and display new file types. well-known plug-ins examples include Adobe Flash Player and Quick Time.



Filters

In computing, filter(high-order function), a higher-order function that processes a data structure( typically a list) in some order to produce a new data structure for containing exactly those elements of the original data structure for which a given predicate returns the boolean value true.





Internet Security Suite

Internet Security Suite is available for Microsoft Windows. It offers anti-malware protection, a personal firewll and a Host-based intrusion Prevention System (HIPS) called Defense+ version 4.0 and later also includes a sandbox feature for isolating unknown applications.



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