| 31. | Why, they even kept their used adding machine tapes.
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| 32. | Cash registers and adding machines that require muscle power.
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| 33. | There are also old television sets in wooden cabinets, manual typewriters and mechanical adding machines.
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| 34. | Other items in the building include crank telephones, oak desks, dictaphones, inkwells, and adding machines.
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| 35. | Blaise Pascal invented the mechanical calculator in 1642; it was the first operational adding machine.
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| 36. | The Dalton adding machine, manufactured from 1902, was the first to have a 10 key keyboard.
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| 37. | By contrast, Dalton Adding Machine and the Standard Adding Machine Company had more modern ten-key keyboards.
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| 38. | They quickly mastered state-of-the-art high-tech gadgetry of their day _ the adding machine, telephone and typewriter.
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| 39. | I would also call this an Adding Machine.
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| 40. | The adding machine range began with the basic, hand-cranked P100 which was only capable of adding.
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