> Also His 1977 Apple ][ is running Apple Dos 3.3 (circa 1983)? - 3.3 was originally released in 1980, it was in 1983 that 3.3 received its last bugfix release

> Also His 1977 Apple ][ is running Apple Dos 3.3 (circa 1983)? - 3.3 was originally released in 1980, it was in 1983 that 3.3 received its last bugfix release. - Sure, why not! Apple DOS wasn't installed anywhere, it had to be loaded from a floppy at boot. Upgrading wasn't a big re-installation or migration. Running DOS 3.3 isn't any weirder than it playing Donkey Kong (1984).