1623 ⟶ Wilhelm 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