[simonmar]

Yes, a fair point. Concurrent and parallel do not describe disjoint sets of programs, of course. However, they really are different concepts. I think wikipedia's page on concurrency could use some work to make this clearer, maybe I'll try to gather enough references to make the case.

If you want to rephrase the title, perhaps "Parallelism =/> Concurrency" would be better ("=/>" is "does not imply").