SCO Xenix 386 v2.2.3b

PCjs has archived an original copy of what may be the oldest surviving 386-based PC operating system.

Previously, that honor went to (a reconstructed copy of) SCO Xenix 386 v2.2.3c, as explained in this series of OS/2 Museum posts:

Also see this series of SoylentNews posts:

When prompted, use the following serial number and activation key:

Serial number:  pcjs.org!
Activation key: ylwbrzkd

NOTE: The PCjs SCO Xenix 386 machines are still being debugged, so don’t expect the operating system to work here quite yet.

[PCx86 Machine]