First “real” computer keyboard?

[leoc]

The Lincoln Keyboard (the rather unique keyboard of the Lincoln Writer, the terminal built for the TX-2 in 1959) incorporated a pair of those Soroban keyboard mechanisms, stacked one in front of the other ("The keyboard is actually two separate Soroban coding keyboards mounted on the same block."—p. 8 of the Lincoln Writer document) while the typewriter unit was a Soroban Computeriter (p. 7).