foone🏳️⚧️ on Twitter: "BTW if you're wondering why I called it "Keyboard 4.0", my bullshit design linage numbering for PC keyboards is that the original IBM PC/XT keyboard was Version 1.0. No
Keyboard scancodes: Special keyboards - XT keyboards
IBM XT PC keyboard | Science Museum Group Collection
DOS Days - XT and AT Keyboards
IBM PC XT keyboard made ergonomic? : r/ErgoMechKeyboards