20.1.05
TIOBE Programming Community Index
The TIOBE Programming Community Index tracks popularity of programming languages. "The ratings are based on the world-wide availability of skilled engineers, courses and third party vendors. The popular search engines Google, MSN, and Yahoo! are used to calculate the ratings." Lisp, Scheme, and ML rate mentions. Erlang and Haskell are tracked, but no ratings are reported since they are not in the top 50.
