I did a lot of work with device models and SPC, while working in VLSI Design. We had SAS and APL2 (with a companion stats package called GraphStat). The APL2/GraphStat combo was awesome, and I always found myself going to APL2 when I really needed to do some analysis. But, APL2 withered on the vine long ago.

After some recent forays into Clojure, Haskell, and R, I find myself getting re-interested in languages in the APL family.

I had read about Q, K and Kdb+ a while ago. Guess I'm going to have to kick the tires.