Here is informative content regarding the context. This explanation covers what this specific version is, why it’s notable, and what “easy install” typically refers to in emulation communities.
The set is non-merged or split-merged depending on the packager. For “easy install,” the set is often non-merged (every ROM contains all required files to run independently, no external BIOS needed for each game). Mame V0.139 Full Arcade Set Roms Easy Install
Common forms of "easy install" for v0.139: Here is informative content regarding the context
: Contains thousands of working arcade titles, including classic fighters like Street Fighter and The King of Fighters . why it’s notable