CSS stands for Cascading Style Sheets. Its a format used to separate design elements in a webpage from content part. For more information on CSS, please read this great tutorial - http://www.hscripts.com/tutorials/css/
Cascading Style Sheets or Counter-Strike Source (CSS) is a PC Game developed by the Valve Corporation
Cascading Style Sheets (CSS) is a language that permits Web designers to attach styles such as spacing, color, font, etc. to HTML documents. Cascading style sheets are similar to a template, permitting Web developers to label styles for an HTML element and then apply it to the number of Web pages required. Thus, Cascading Style Sheets (CSS) are collections of formatting rules please read : for more information http://websharp.wordpress.com/2009/02/25/tips-to-use-css-for-search-engine-optimization/