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3. The Topcat Series (1976 - 1977) |
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HP 91
Introduced on
March 1, 1976, it was the 10th HP calculator, but a
obviously the first that was not a handheld one, although it
could be operated on batteries. It had the basic scientific
functions, but was not programmable. It was the first
calculator to use more accurate algorithms to calculate 2^3
to exactly 8, as opposed to earlier HP models.
Code
name: Felix. Original price: $500 |
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HP 97
Introduced on
July 1, 1976, it was the printing equivalent of the HP 67,
but in the HP 91 shape and size. Like the HP 67, it included
a magnetic card reader and was full programmable. This was a
popular calculator and was kept in production for a long
time.
Code
name: Kitty Hawk. Original price: $750 |
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HP 92
This was the business model of the series, introduced on
July 1, 1977. Programmable, but with a complete set of
business functions.
Code
name: Bobcat. Original price: $625 |
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HP 97S
Introduced on December 1, 1977,
this was a redesigned HP 97 that had a special green I/O box
that could communicate with outside devices. This was one of
the most expensive handheld sold by HP.
Code
name: Ricochet. Original price: $1,375 |
Click on the images for a larger picture.
Click on the
for a picture of the manual's front cover.
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