XHTML & HTML 5  
Latest improved html language, rationalises code, richer multimedia support, interactive, mobile devices, web applications, document object models, full CSS3 support.

 CSS2 & CSS3  
Presentation semantics, design modularisation, document presentation, structural content, design flexibility, control.

 jQuery  
Fast, feature-rich, html manipulation, events handling, animation, rich content, interactions, browser compatibility, versatility, extensibility.

 PHP  
Object orientated programming, server-side scripting, data objects, patterns, properties, inheritance, methods, secure, stable.

 SQL  
Database architecture, systems, users, databases, cross platform.