kit

kit n.  [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 term {distribution} may imply that
   special tools or more stringent conditions on the host environment
   are required.