The Amiga 2500 is really just an A2000 which was supplied with either a Commodore A2620 or a Commodore A2630 processor card, and a hard drive controller which was the Commodore A2090 or A2091. The A2500 was available with a choice of operating systems. In addition to the conventional AmigaOS, the A2500 could be purchased with Commodore Amiga UNIX, commonly known as Amix. A System V based UNIX operating system. Commodore never rebadged A2500's supplied with UNIX as A2500/UX like they did with the A3000/UX however A2500's running Amix were often dubbed A2500/UX.

Please see the A2000.