Wednesday, 20 April 2011

The Internet, The Web and Electronic Commerce

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Url:  “Uniform Resource Locator”, is a string of characters used to represent and identify a page of information on the World Wide Web that is used by an web browser such as Netscape or Internet Explorer to find HTTP, FTP, telnet, gopher and other resources on the Internet.


HTML: "HyperText Markup Language" is the authoring language used to create documents on the World Wide Web (WWW). HTML is similar to SGML, although it is not a strict subset. HTML defines the structure and layout of a Web document by using a variety of tags and attributes. All the information you'd like to include in your Web page fits in between the tags. There are hundreds of other tags used to format and layout the information in a Web page. Tags are also used to specify hypertext links. These allow Web developers to direct users to other Web pages with only a click of the mouse on either an image or word(s). 


Javascript: JavaScript is a very flexible object-oriented language when it comes to syntax. In this article you can find three ways of defining and instantiating an object. Even if you have already picked your favorite way of doing it, it helps to know some alternatives in order to read other people's code.

Applets: An applet is a little application. Prior to the World Wide Web, the built-in writing and drawing programs that came with Windows were sometimes called "applets." On the Web, using Java, the object-oriented programming language, an applet is a small program that can be sent along with a Web page to a user. Java applets can perform interactive animations, immediate calculations, or other simple tasks without having to send a user request back to the server.


Blogs:  A blog is a web site containing the writer's or group of writers' own experiences, observations, opinions, etc., and often having images and links to other Web sites.


Wikis: A collaborative Web site comprises the perpetual collective work of many authors. Similar to a blog in structure and logic, a wiki allows anyone to edit, delete or modify content that has been placed on the Web site using a browser interface, including the work of previous authors. In contrast, a blog, typically authored by an individual, does not allow visitors to change the original posted material, only add comments to the original content.


FTP: Short for File Transfer Protocol, the protocol for exchanging files over the Internet. FTP works in the same way as HTTP for transferring Web pages from a server to a user's browser and SMTP for transferring electronic mail across the Internet in that, like these technologies, FTP uses the Internet's TCP/IP protocols to enable data transfer.


Plug-in: A software plug-in is an add-on for a program that adds functionality to it. For example, a Photoshop plug-in may add extra filters that you can use to manipulate images. A browser plug-in allows you to play certain multimedia files within your Web browser. VST plug-ins add effects for audio recording and sequencing programs such as Cubase and Logic Audio.


Filters: a circuit or device that passes certain frequencies and blocks others.


Internet Security Suite: A collection of software utilities that protect a user's computer from viruses and other malware. Managed by a single control panel interface that displays all the functions, antivirus and firewall are typically the primary elements. Other functions include antispam, parental controls, Web site authentication, password storage and protection against identity theft. Backup and computer tune-up may also be part of the collection. See security protocol and malware.

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