Basic: first language, played around with it as a kid. Java: had to learn it for school. Python: got tired of Java's verbosity, friend recommended it. Ocaml:

Basic: first language, played around with it as a kid. Java: had to learn it for school. Python: got tired of Java's verbosity, friend recommended it. Ocaml: job at a quant hedge fund. Lisp/Clojure: SICP. C++: Worked at Google for 6 months-- not long enough to join the set of 23 people in the world who actually understand it. Scala: wanted to use a better language in a Java shop that insisted on static typing. Haskell: studied it a bit on my own. Haven't used it for anything big, though. C: Coursera's GPU programming course. Zed Shaw's "Learn C the Hard Way". Wouldn't say I really "know" C but I understand the principles. Assembly: Programming from the Ground Up. Again, wouldn't say I really "know" it but I grok the principles.