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In about 1970 HP co-founder Bill Hewlett challenged France Rode to create a "shirt-pocket sized HP-9100".At the time, slide rules were the only practical portable devices for performing trigonometric and exponential functions, as existing pocket calculators could only perform addition, subtraction, multiplication, and division.
Curtas were considered the best portable calculators available until they were displaced by electronic calculators in the 1970s. [1] The Curta, however, lives on, being a highly popular collectible, with thousands of machines working just as smoothly as they did at the time of their manufacture. [1] [6] [7]
By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called Cal Tech, whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...
The Texas Instruments TI-30 calculator retailed for $24.95 in 1976 at O’Neil's department store in Akron.
The HP 35s (F2215A) is a Hewlett-Packard non-graphing programmable scientific calculator. Although it is a successor to the HP 33s, it was introduced to commemorate the 35th anniversary of the HP-35, Hewlett-Packard's first pocket calculator (and the world's first pocket scientific calculator).
The Sharp EL-8, also known as the ELSI-8, [1] was one of the earliest mass-produced hand-held electronic calculators [1] and the first hand-held calculator to be made by Sharp. Introduced around the start of 1971, [ note 1 ] it was based on Sharp's preceding QT-8D and QT-8B compact desktop calculators and used the same logic circuits, but it ...
Sold for: $7,200 The 1970 Donruss Odder Odd Rods Wax Box is a nostalgic gem for collectors of vintage non-sports trading cards. Packed with quirky charm, the set features vibrant, cartoonish ...
Though the King Seeley "Yellow Submarine" lunchbox from 1968, is worth up to $1,300, an original Smokey Bear lunchbox from the early 1970s can go for over $700 on eBay. The most valuable ...