[Usenet; poss. fr. DEC slang for a full
software distribution, as opposed to a patch or upgrade] A source
software distribution that has been packaged in such a way that it
can (theoretically) be unpacked and installed according to a series
of steps using only standard Unix tools, and entirely documented by
some reasonable chain of references from the top-level README file. The more general ter
special tools or more stringent conditions on the host environment
are required.