- Abacus
- Napier's Bone
- Slide Rule
- Pascaline
- Leibniz's Calculating Machine
- Charles Babbage
- Mark 1
- Attansoff Berry Computer (ABC)
- Electronic Numerical Integrator and Calculator (ENIAC)
- Electronic Discrete Variable Automatic Computer (EDVAC)
- Universal Automatic Computer (UNIVAC)
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