Lear Siegler ADM-3A
The Lear Siegler ADM-3A terminal is an expanded version of the ADM-3 terminal. It was introduced in July, 1976 at a price of $1045.
References
"Lear Siegler Upgrades ADM-1, Gives ADM-3 Full Cursor Ability", Computerworld, July 5, 1976, pg. 17