Keypunch
The keyboard where a computer's input was literally knocked out of the card stock, one character at a time, by someone paid per keystroke.
Hollerith's first punch was a pantograph: the operator moved a stylus across a template and pressed down, hole by hole. Its replacement by a keyboard over the first decades of the twentieth century is the whole history of data entry in miniature — the machine adapted to the fingers rather than the other way round. IBM's 024 and 026 of 1949 added the feature that made the work bearable: the card was printed along its top edge as it was punched, so a human could read what it said without decoding hole positions. The 029 of 1964 became the model most people remember.
The work itself was organised like a factory. Programmers and clerks filled in coding sheets, which went to punch rooms where almost exclusively women keyed them in against quotas measured in strokes per hour. Checking happened on a separate verifier, where a second operator keyed the same material and the machine compared. The job title outlived the cards by a good margin, surviving into the 1980s — which says something about how long a work process can persist after its technology.