Calculators are so common nowadays that even most cell phones have them built-in, but the first ones actually appeared way back in 1823. The first ones were actually mass produced and sold in 1823. These particular examples were created by Aaron, complete with “switches, levers and cranks.” Click here for more pictures.

[via PlanetOddity]

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Calculators are so common nowadays that even most cell phones have them built-in, but the first ones actually appeared way back in 1823. The first ones were actually mass produced and sold in 1823. These particular examples were created by Aaron, complete with “switches, levers and cranks.” Click here for more pictures.

[via PlanetOddity]

Photo Photo Photo Photo Photo Photo Photo Photo Photo Photo Photo