Web site development 22 HTML (Document markup language) 16 JavaScript (Computer program language) 11 Web sites 9 Design 8 Application software 6 Development 6 Internet programming 5 PHP (Computer program language) 5 Ajax (Web site development technology) 4 Cascading style sheets 4 Database management 4 Open source software 4 Application program interfaces (Computer software) 3 Authoring programs 3 Computer games 3 Geographic information systems 3 Programming 3 Computer animation 2 Document Object Model (Web site development technology) 2 Electronic books 2 Geology 2 Multimedia systems 2 Plug-ins (Computer programs) 2 Query languages (Computer science) 2 Real-time data processing 2 Relational databases 2 Ruby (Computer program language) 2 Web site 2 Blogs 1