What is "comptometers"

Usage examples of "comptometers".

He would have to take the money in a little box to the huge clacking hotel treasury full of comptometers that -- so Larry in the Harlequin Bar upstairs had asserted -- if programmed proper could be made to see right through to your very soul.

SLOANE—ARCHITECT, and pushed into a huge room filled with the almost unbearable clatter of typewriters and Comptometers, the buzz of voices, and the jarring thump of an addressing machine.

SLOANEARCHITECT, and pushed into a huge room filled with the almost unbearable clatter of typewriters and Comptometers, the buzz of voices, and the jarring thump of an addressing machine.