Here's some more for your list that seem to come up a lot:
BRW = Brazilian Rosewood
NxD = New {anything} Day, such as New Guitar Day, New Amp Day, New Banjo Day (??!?)
UST = Undersaddle transducer, a piezo pickup. Fishman Matrix, for example.
AST = Acoustic Soundboard Transducer, fits within the guitar on the bridge plate. K&K Pure Western Mini, for example.
Mic = Microphone
ES = Expression System (after all, this is UTGF!)
LS = Lucky Strike, referring to a specific redwood log renowned for its sound
TB = Tonno Basso, another redwood log known for its, well, bass
The Tree = Another named mahogany log that is known for its tortoiseshell-like figure