Design 31 Python (Computer program language) 30 Web site development 25 Web sites 25 Development 22 Data processing 21 Application software 19 Java (Computer program language) 18 Perl (Computer program language) 17 Programming 16 iPhone (Smartphone) 16 Internet programming 15 JavaScript (Computer program language) 15 Computer programs 13 User interfaces (Computer systems) 13 Data mining 11 Human-computer interaction 11 Computer networks 10 Database management 10 Management 10 R (Computer program language) 10 HTML (Document markup language) 9 Machine learning 9 Mobile computing 9 Operating systems (Computers) 9 User-centered system design 9 Object-oriented programming (Computer science) 8 Open source software 8 PHP (Computer program language) 8 SQL (Computer program language) 8