1623Wilhelm Schickard's Calculating Clock

Wilhelm Schickard drew a calculating clock on a letter to Ke...
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1623
1642
1672

🕰️ Wilhelm Schickard's Calculating Clock

Wilhelm Schickard drew a calculating clock on a letter to Kepler. This will be the first of five unsuccessful attempts at designing a direct entry calculating clock in the 17th century (including the designs of Tito Burattini, Samuel Morland and René Grillet).
Wilhelm Schickard's Calculating Clock (1623)
Calculating MachinesMechanical ComputationEarly ComputingTechnologyHardwarePrecursors to Computers
GermanyGermany

➕ Blaise Pascal's Mechanical Calculator

Blaise Pascal invented a Mechanical calculator, the first digital calculating machine.
Blaise Pascal's Mechanical Calculator (1642)
Calculating MachinesMechanical ComputationTechnologyHardwareEarly ComputersPascaline
FranceFrance

➕ Gottfried Wilhelm Leibniz's Stepped Reckoner

Gottfried Wilhelm Leibniz improved the earlier machines, making the Stepped Reckoner to do Multiplication and division.
Gottfried Wilhelm Leibniz's Stepped Reckoner (1672)
Calculating MachinesMechanical ComputationTechnologyHardwareEarly ComputersStepped Reckoner
GermanyGermany