They are just PS/2 keyboards, right? Or AT? The USB adapters for that are a
dime a dozen. I have 4 in my basement (the real PS/2 to USB, not the faux
ones that allowed dual-mode mice to connect to USB).
Warner
The 3101 is not PS/2, pre-dates the IBM PC. If someone made an adapter
it'd be unique to this class of terminal. May be like a DisplayWriter
perhaps.