Re: Who made the first pocket calc? Message #4 Posted by Larry Gilbert on 30 Apr 2003, 3:03 p.m., in response to message #1 by Tom (UK)
The first portable (battery-operated) calculator was the Sharp QT-8B, manufactured in 1970. It was not a pocket calculator, measuring about 10" x 5", and it fit into a larger recharging cradle. It used an unusual blue tube display. In late 1970 - early 1971, Sharp shrunk this model to more of a "palm-size" and called it the EL-8; concurrently, Canon came out with the Pocketronic (a printing-only model with a ticker tape type printing mechanism). Many people consider those two the first truly pocketable calculators (coat-pocket only!). The next step in miniaturization came around September 1971, with the introduction of the Bowmar 901B (made in USA) and the Busicom Handy LE-120A (which may have beat the Bowmar by one or more months). These two, especially the Busicom, are closer in size to what we think of as pocket calculators. The Busicom is quite remarkable (and rare); it is only about 3/4" thick I believe, and is considered to be the first calculator with an LED display, and the first to use a single chip. The Bowmar sold initially for $240, well under the $300-$400 for the other models, and therefore sold quite well, not just as a Bowmar, but also badged as the Craig 4501 and the Commodore C110.
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