HP-21
The HP-21 was a scientific calculator produced by Hewlett-Packard between 1975 and 1978. It was designed as a replacement for the HP-35, and was one of a set of three calculators, the others being the HP-22 and HP-25, which were similarly built but aimed at different markets. Its HP development codename was Pumpkin, and it was a member of the Woodstock series. Its US price was $125 in 1975, $80 in 1978.
HP-21
The HP-21 was a scientific calculator produced by Hewlett-Packard between 1975 and 1978. It was designed as a replacement for the HP-35, and was one of a set of three calculators, the others being the HP-22 and HP-25, which were similarly built but aimed at different markets. Its HP development codename was Pumpkin, and it was a member of the Woodstock series. Its US price was $125 in 1975, $80 in 1978.
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The HP-21 was a scientific cal ...... was $125 in 1975, $80 in 1978.
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The HP-21 was a scientific cal ...... was $125 in 1975, $80 in 1978.
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HP-21
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