The Internet, the web and Electronic commerce.

URL 

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Stands for "Uniform Resource Locator." A URL is the address of a specific Web site or file on the Internet. It cannot have spaces or certain other characters and uses forward slashes to denote different directories. The first part of a URL indicates what kind of resource it is addressing. The second part of a URL (after the "://") contains the address of the computer being located as well as the path to the file. 




HTML 
(HyperText Markup Language) The document format used on the Web. Web pages are built with HTML tags, which are codes embedded in the text. The tags define the page layout, fonts and hypertext links to other documents on the Web. Each link contains the URL (the address) of a Web page residing on the same server or any server worldwide, hence "World Wide" Web." The HTML also defines all the graphic elements used on the page, which are separate files on a local or remote server.

Javascript
Java Script is a user interface scripting language developed by Netscape for its Navigator and Communicator World Wide Web browsers. Microsoft has developed a compatible language, called J-Script, for its Internet Explorer browser.

While the syntax of the Java Script programming language resembles that of Java, the two languages are actually unrelated. Java Script source code is embedded in HTML documents, and is interpreted by a World Wide Web browser. Java source code is compiled into a bytecode, stored in a separate file, which the World Wide Web browser downloads and executes separately from an HTML page.

Applets  

A small Java program which is cross-platform compatible and can be embedded in the HTML of a webpage. Web browsers, which are usually equipped with Java virtual machines, can run the applets to perform interactive graphics, games, calculators, etc.  "Applets" differ from "Java applications" in that they are more secure -- they can't access certain resources on the local computer, such as hard drives, modems, and printers; and they can only make an Internet connection to the computer from which the applet was sent.

Blogs

A blog (a blend of the term web log)  is a type of website or part of a website. Blogs are usually maintained by an individual with regular entries of commentary, descriptions 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 verb, meaning to maintain or add content to a blog.

Most blogs are interactive, allowing visitors to leave comments and even message each other via widgets on the blogs and it is this interactivity that distinguishes them from other static websites.

Many blogs provide commentary or news on a particular subject; others function as more personal online diaries. A typical blog combines text, images, and links to other blogs, Web pages, and other media related to its topic. The ability of readers to leave comments in an interactive format is an important part of many blogs. Most blogs are primarily textual, although some focus on art (art blog), photographs (photoblog), videos (video blogging), music (MP3 blog), and audio (podcasting). Microblogging is another type of blogging, featuring very short posts.

As of 16 February 2011, there were over 156 million public blogs in existence.

Wikis 

A wiki is a Web site that allows users to add and update content on the site using their own Web browser. This is made possible by Wiki software that runs on the Web server. Wikis end up being created mainly by a collaborative effort of the site visitors. A great example of a large wiki is the Wikipedia, a free encyclopedia in many languages that anyone can edit. The term "wiki" comes from the Hawaiian phrase, "wiki wiki," which means "super fast." I guess if you have thousands of users adding content to a Web site on a regular basis, the site could grow "super fast."

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 built on a client server architecture and utilizes separate control and data connections between the client and server. FTP users may authenticate themselves using a clear-text sign-in protocol but can connect anonymously if the server is configured to allow it.
The first FTP client applications were interactive command-line tools, implementing standard commands and syntax. Graphical user interface clients have since been developed for many of the popular desktop operating systems in use today.

Plug-In

In computing, 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 functionality of an application. For example, plug-ins are commonly used 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.
Add-on is often considered the general term comprising snap-ins, plug-ins, extensions, and themes.

Filter

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 containing exactly those elements of the original data structure for which a given predicate returns the boolean value true. A program that accepts a certain type of data as input, transforms it in some manner, and then outputs the transformed data. For example, a program that sorts names is a filter because it accepts the names in unsorted order, sorts them, and then outputs the sorted names.

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Internet security software covers a wide variety of potential risks, including hacker intrusions, destruction of data, harmful viruses, Trojan horses and other malicious attacks. Computer security software is available either within the computer's operating system or add-ons freely downloaded or purchased. Computer security software offers peace of mind amid a growing array of risks that increase exponentially as more PCs become accessible through the internet.