Mame 2003-plus Reference: Full Non-merged Romsets ((free))

Do you need help like ClrMamePro to verify your current collection?

Usually, Clones share files with the Parent. If you download a "Split" set of a Clone, you must have the Parent folder present in the same directory for the Clone to work. mame 2003-plus reference: full non-merged romsets

By adhering to the convention with a correctly versioned set, you will achieve the highest possible compatibility with MAME 2003-Plus across RetroArch, Lakka, RetroPie, and other libretro-based emulation platforms. Do you need help like ClrMamePro to verify

: Non-merged sets are larger than "Split" or "Merged" sets because they duplicate data across many ZIPs. mame 2003-plus reference: full non-merged romsets

A ROMset ensures that every single game folder contains all the files it needs to run.

But why 2003? Why "Non-Merged"? And what does "Reference" mean in this context?