Many developers (including me) like to compare the popularity of the programming languages they use to others. I have been using TIOBE's Programming Community Index for 2 years now and thought its worth writing a post about. TIOBE is a software company based in The Netherlands. And the Programming Community Index is an index of the most widely used programming languages and a rating they calculate. The ratings are based on the number of skilled engineers world-wide, courses and third party vendors. This is done using the popular search engines Google, MSN, Yahoo!, and YouTube.