OSS OS-A+
Optimized Systems Software OS/A+ Version 1.1; Copyright (C) 1981 OSS, Inc.
#
ATR image
#
OSS_OS-A+_1.2e_and_EASMD_1.0.atr
Manuals
#
OSS_OS-A+_version_1.1.pdf
; size: 1.2 MB
OSS OS/A+ version 1.1 May 1981
; size: 4.9 MB ; thanks to Atarimania! :-)