The objects below comprise “Collection Calculant” - a collection of “things that count”. (Click on photos to enlarge; click on text for fuller item description.)
For a more detailed collection objects list click here. For their story in context of a history of calculation click here.
Objects
1. Beginnings
2. Conversion and Reckoner Devices
3. Sectors
4. Slide Rules
5. Simple adder/subtractors
6. Early keyboard operated adders
7. Stepped-drum Arithmometers
8. Direct Multiplying & Proportional Rack Calculators
9. Pinwheel Calculators
10. Comptometers
11. Curta and Alpina (step drum miniaturised calculators)
12. From electromechanical to electronic calculation
Ephemerae
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