This is the TIOBE Programming Community Index for July 2011. As is stated on their home page:
TIOBE is specialized in assessing and tracking the quality of software. We measure the quality of a software system by applying widely accepted coding standards to it.
It is interesting to see what languages are the most popular on the web and which ones are up and coming. Below is a brief description:
"The TIOBE Programming Community index is an indicator of the popularity of programming languages. The index is updated once a month. The ratings are based on the number of skilled engineers world-wide, courses and third party vendors. The popular search engines Google, Bing, Yahoo!, Wikipedia, YouTube and Baidu are used to calculate the ratings. Observe that the TIOBE index is not about the best programming language or the language in which most lines of code have been written.
The index can be used to check whether your programming skills are still up to date or to make a strategic decision about what programming language should be adopted when starting to build a new software system. The definition of the TIOBE index can be found here"
