Kinds of Software

Andy Bakun writes "I'm seeing a gross misuse of the terms used to describe the products of the open source movement. In an attempt to do my part, I've compiled a list of layman definitions of the kinds of software... I'm not up on some of the legal aspects (my definition of 'public domain' is most likely way off). Anyway, take a look, let me know if I should revise some of them. If anything, point me, and everyone else, of some other on-line authoritative source for the meanings of these words."