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1973
Hardware Description
The Model 18-1721 is a "scientific" calculator that was built in mid-1973. It provides trig and log functions and their inverses, powers (including fractional and negative), square roots, and reciprocals. It operates in degrees or radians, and in common or natural logarithms, and has a single (accumulating) memory register.
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Model Number:
1800-1721 -
Manufacturer:
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Hardware Type:
Calculator -
Manufacture Year:
1973 -
More Info:
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