ADM-3A Terminal

ADM-3A Terminal, first shipped in 1976.

This is the machine that begot the vi editor.

Keyboard

Interesting notes:

• Note the arrow keys over H J K L
• Note the position of the Escape key.
• Note the position of Ctrl.
• Note the colon key : without needing to hold shift. That's why vi uses it.
• Note Home and ~ key. That's why a tilde ~ represent home directory in unix systems.

This machines is how vi's key began, see History of vi Keys