Glossary

BASS: Beneath a Steel Sky, an adventure game
BS: Broken Sword, a series of adventure games developed by Revolution Software
COMI: The Curse of Monkey Island, the third installment of the famous Monkey Island series
DOTT: Day of the Tentacle, a SCUMM adventure game
FM-TOWNS: The FM-TOWNS was a series of x86 computers built by Fujitsu and targetted at the Japanese gaming market in the form of the "FM-TOWNS Marty" 32-bit consoles. Various early SCUMM games were enhanced and ported to this platform by LucasArts. Much of this porting work was done by Jim Leiterman
FOA: Fate of Atlantis, also knows as Indiana Jones 4, a SCUMM adventure game
FOTAQ: Flight of the Amazon Queen, an adventure game
FT: Full Throttle, a SCUMM adventure game
HE: Humongous Entertainment
IHNM: I Have No Mouth and I Must Scream, a game based on the SAGA engine
iMUSE: Interactive Music Streaming Engine, or Interactive Music and Sound Effects. A sound system that was created by Michael Z. Land and Peter McConnell for Monkey Island 2. It was further developed for Sam & Max Hit the Road, where it was also credited to Justin Graham. Once described as a "souped-up MIDI sequencer", a digital version was developed for the later games. Possibly by Michael McMahon.
INSANE: INteractive Streaming ANimation Engine, a secondary scripting engine for interactive SMUSH scenes.
ITE: Inherit The Earth, a game based on the SAGA engine
LEC: LucasArts Entertainment Company
MI: Monkey Island, a series of SCUMM adventure games
MM: Maniac Mansion, a SCUMM adventure game
MT-32: The Roland MT-32 is a MIDI synthesizer module. Many DOS games from the early 90s featured special sound tracks custom taylored for this device
SAGA: Scripts for Animated Graphic Adventures. A scripting engine originally developed by The Dreamers Guild, Inc. Later rights to its version used for ITE was obtained by "The Wyrmkeep Entertainment Co."
SCUMM: Script Creation Utility for Maniac Mansion, a scripting language (and not really an engine; see SPUTM) originally developed by LucasArts for creating graphics adventure.
SMUSH: TODO
SPUTM: SCUMM Presentation Utility (properly abbreviated as SPU(tm) with a trademark symbol), the actual script interpreter and engine behind SCUMM-scripted titles.