E.g. - (k4/q) http://code.kx.com/wiki/Reference/hopen shows how to open a file/proc.

The rest of the wiki is quite useful including a references and tutorials for q.

k5 uses operators instead of words like q.

Btw, being able map/reduce w/ 1000 procs on a 8GB Linux vm (using k5) is both useful and fun.