Ruby (Computer program language) 47 Object-oriented programming (Computer science) 24 Web site development 7 Java (Computer program language) 6 Application software 2 Biology 2 Data processing 2 Development 2 Enterprise application integration (Computer systems) 2 Groovy (Computer program language) 2 Internet programming 2 Medicine 2 Plug-ins (Computer programs) 2 Python (Computer program language) 2 Ruby on rails (Electronic resource) 2 Software refactoring 2 Ruby on Rails 1