PHP
Short for Hypertext Pre-processor, it is a programming language mainly used if you wish to create a website that will interact with databases, or web based software. It can be created much like a standard HTML code and is very similar to the syntax and PERL languages.

ASP
Also know as Active Server Pages, ASP is scripting language developed by Microsoft. Mainly used for creating complex interactive web sites, such as auction websites and e-commerce websites.

CSS
CSS, short for Cascading Style Sheets, a new feature being added to HTML that gives both Web site developers and users more control over how pages are displayed. With CSS, designers and users can create style sheets that define how different elements, such as headers and links, appear. These Style Sheets can then be applied to any Web page.

HTML
Hypertext Markup Language is used to create websites. The actual HTML is a simple text file that will be read and interpreted by the browsers and will then show you the final outcome. Various browsers may interpret the same code differently and therefore show the website incorrectly.

JavaScript
JavaScript is a script language which consists of a system of programming codes. It can be embedded into a HTML easily and can add a lot more user interactions and functionality to a website.

Actionscript
ECMAScript-based programming language used in Macromedia’s Flash and is used to control flash movies and applications.