HP 22 Hewlet-Packard Business Calculator |
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| "Introduced on August 1 1975, six months after the HP-21, this was the eighth equal (with the HP-25) handheld electronic calculator sold by HP - the business counterpart of the HP-21, and the same size... Its codename of "Turnip" carried on the tradition of calling these models after vegetables." Wlodek Mier-Jedrzejowicz. | |
| Source: MoHPC - The Museum of HP Calculators | |