Actually the initial list is fine.
All of these standards are supported everywhere.
MUI: MOS, OS4, Zune on AROS.
CGX API: MOS, AOS4 through P96's CGX emul,
dunno about AROS.
AHI: everwhere
BSDSocket: Everywhere
SDL: Everywhere.
OGL: soon to be everywhere.
I think that the ELF executable format should be added,
it's used by both OS4 and MOS.
