ADM-3A Terminal

By Xah Lee. Date: . Last updated: .

ADM-3A Terminal, first shipped in 1976.

This is the machine that begot the vi editor.

terminal ADM-3A
The ADM-3A terminal. (12 inch screen; 24 lines of 80 characters.) 2676×2370 [ ]
terminal ADM-3A keyboard
Terminal ADM-3A keyboard.
terminal ADM 3A number pad
Terminal ADM-3A number pad.


adm-3a keyboard cb140
ADM-3A keyboard [image source]

Interesting notes:

ADM 3A terminal layout 6aec4
The ADM-3A terminal keyboard layout. [see History of Emacs and vi Keys]

ADM-3A says to vi: I am your father

This machines is how vi's key began, see

See History of Emacs and vi Keys

Adm3a Operators Manual

Hacker Lore Keyboards

Xah Keyboard Guide