LucasArts is a computer game company founded by George Lucas. Before becoming a separate entity, the games were released under the Lucasfilm Games label.
While building its reputation as a developer of excellent graphic adventure games beginning in the late 1980s, the company switched to marketing the Star Wars franchise in the late 1990s. LucasArts was purchased by Disney in 2012. In April 2013, Disney ceased all development at LucasArts and laid off most of its staff. LucasArts now exists mostly to license Lucasfilm properties to third party game developers and publishers, however they occasionally serve as a digital publisher as well.
LucasArts produced many adventures like the Monkey Island series based on the SPUTM engine, which used the SCUMM scripting language, which also gave the ResidualVM sister project, ScummVM, its name.
The last two original LucasArts adventures Grim Fandango and Escape from Monkey Island, being 3D Adventures, did not use the SCUMM scripting language. These games used the GrimE engine. ResidualVM was started with the goal to support these two games, the residual (remaining) LucasArts adventure games that didn't use the SCUMM engine. It is also a word pun, as grime is a kind of residue.
PASSIGAR also has a very good list of almost all known LucasArts game versions
Wikipedia article on LucasArts