minor nit - this is a very poorly named site. A better name might be "the history of workstation and personal computer graphical user interfaces", a very far cry from blanket coverage of all "user interfaces".
Even foregoing simple UI such as the handle of a hammer, or even the mechanical interfaces of yesteryear such as the differences between a Curta calculator and the original Burroughs adding machine, or a Jacquard loom and so forth...
Limiting ourselves to just binary digital computers we're still missing a lot at this site. IBM 1401 card punch machines... the IBM 360 operator console... the VAX DCL, the original UNIX sh, etc., etc.
Even foregoing simple UI such as the handle of a hammer, or even the mechanical interfaces of yesteryear such as the differences between a Curta calculator and the original Burroughs adding machine, or a Jacquard loom and so forth...
Limiting ourselves to just binary digital computers we're still missing a lot at this site. IBM 1401 card punch machines... the IBM 360 operator console... the VAX DCL, the original UNIX sh, etc., etc.