![]() ![]() ![]() Bowmar’s total sales increased from $3m in 1971 to $64m in 1973. It sold for about USD $200.īy 1974, Bowmar was the largest manufacturer of hand-held calculators in the world. The Bowmar 901B had 4 functions - add, subtract, multiply and divide - and that was all it does. This model (the 901B) was also produced for other companies including Craig (model 4501) and Commodore (C110). So good was the reception to the Bowmar 901B calculator, fondly called the Bowmar Brain, that in September 1971 it moved into large scale calculator production. Bowmar was a small company specialising in high technology components for the space programmes and produced a hand-held calculator as a demonstration device for its Light Emitting Diode (LED) displays - "funny red numbers that are almost illegible".
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