Space-cadet, Lisp Machine Keyboards

By Xah Lee. Date: . Last updated: .

The Knight Keyboard

One of the first Lisp Machine keyboard, called Knight keyboard.

Novena  Knight keyboard 16277937833-s
Knight keyboard with Novena laptop, 2015. 2592×1944 〔photo by MMcM. Image source, ©
lisp knight keyboard
Knight keyboard 〔image source Knight (TK) keyboard @

The Knight keyboard is designed by Tom Knight, was used with the MIT-AI lab's bitmapped display system. It was a precursor to the space-cadet keyboard.

Tom Knight is an American synthetic biologist and computer engineer, who was formerly a senior research scientist at the MIT Computer Science and Artificial Intelligence Laboratory, a part of the MIT School of Engineering.

In 1967 Knight wrote the original kernel for the ITS operating system, that ran on PDP-6 and PDP-10 computers.

In 1968, Knight designed and supervised the construction of the first PDP-10 ARPANET interfaces with Bob Metcalfe.

In 1972, Knight designed one of the first semiconductor memory-based bitmap displays…

In 1974, Knight designed and implemented the prototype version of the MIT Lisp Machine processor…

Wikipedia Tom Knight (scientist)

Space-cadet Keyboard

This is the famous Space-cadet Keyboard.

Space-Cadet keyboard 2
Space-cadet Keyboard

For detail and much more photos, see:

Symbolics Keyboard PN 364000

This model comes after the Space-cadet keyboard.

Symbolics keyboard
Symbolics Keyboard PN 364000. (Photo by webwit @ Used with permission.)

Symbolics keyboard PN 365407 Rev C

This model comes after the PN 364000, and is compatible to it.

Symbolics's Lisp Machine keyboard PN 365407 Rev C. (Photo by Joey Devilla. Used with permission.)
Left side.
Right side.