A collection of the first-generation, hand-held calculators that quickly replaced the slide rule for most quick scientific and engineering calculations. They formed the bridge between slide rules, second-generation, programmable calculators and the desk-top PC (Personal Computer). The first widely used version at CRNL was the Hewlett Packard HP35, which appeared about 1973 and typically was priced at $400 CDN. The collection contains the following models: HP 11C, HP25 (two of), HP 32SII, HP 33E, HP 34 C, HP35 (three of); HP45, HP67 and a Texas Instrument SR 56. The collection also contains a series of user manuals for most of the calculators.
