Why is the ninth month called September?
1580s, from Latin aemulator, agent noun from aemulari (see emulation). Computer sense attested by 1965.
1580s, back-formation from emulation, or else from Latin aemulatus, past participle of aemulari "to rival." Related: Emulated; emulating.
Hardware or software that performs emulation. (1995-05-12)