What does PLUM stand for?

What does PLUM mean?

PLUM	Peace Love And Understanding Machine Computing » Software
PLUM	Probabilistic Language Understanding Model Computing » General
PLUM	Practical Lightweight Universal Methodology Miscellaneous » Unclassified
PLUM	Price Lookup Universal Management Business » General
PLUM	The Peace Love And Unity Movement Miscellaneous » Unclassified
PLUM	Portable Library Unit And Monitor Computing » General
PLUM	Payload Umbilical Mast Governmental » NASA

plum(n.): the drupaceous fruit of any of several trees belonging to the genus Prunus, of the rose family, having an oblong stone.