Virus.DOS.APME.Demo.620 or APME is a virus that runs on MS-DOS.
APME is an ordinary polymorphic generator such as MtE and TPE. There is only one known virus APME.Demo that is included in APME.ZIP distribution package as APME.COM file. The virus opens APME.COM file, and overwrites it with new virus copy. Then the virus displays:
[_PME] Alpha PolyMorphic Engine by ViKing - Version 1.04b.