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HP calculators are various calculators manufactured by the Hewlett-Packard company over the years. Their desktop models included the HP 9800 series, while their handheld models started with the HP-35. Their focus has been on high-end scientific, engineering and complex financial uses.
Like all Hewlett-Packard calculators of the era and most since, the HP-65 used Reverse Polish Notation (RPN) and a four-level automatic operand stack. Bill Hewlett's design requirement was that the calculator should fit in his shirt pocket. That is one reason for the tapered depth of the calculator.
Also available for the TI-59 and TI-58 was a thermal printer (the PC-100A, B, and C models); the calculator was mounted on top of the printer and locked in place with a key. The calculator can be programmed to request input from the user, and output results of calculations to the printer.
The Hewlett-Packard 9100A (HP 9100A) is an early programmable calculator [3] (or computer), first appearing in 1968. HP called it a desktop calculator because, as Bill Hewlett said, "If we had called it a computer, it would have been rejected by our customers' computer gurus because it didn't look like an IBM. We therefore decided to call it a ...
Obsolete technology website — Information about many old computers. old-computers.com — Web Site dedicated to old computers. oldcomputer.info — Web site with information about many old computers. History of Computers — online magazine featuring pictures and information about many computers made between the 1970s and the early 1990s
A total of 40,000 units were sold; 90% of them in the United States where the sale price was $3,200 [4] (increasing to about $3,500 in 1968. [7]) About 10 [19] Programma 101 were sold to NASA and used to plan the Apollo 11 landing on the Moon. By Apollo 11 we had a desktop computer, sort of, kind of, called an Olivetti Programma 101.
The Monroe EPIC was a programmable calculator that came on the market in the 1964. It consisted of a large desktop unit which attached to a floor-standing logic tower and was capable of being programmed to perform many computer-like functions.
Made in Japan, this was also the first calculator to use an LED display, the first hand-held calculator to use a single integrated circuit (then proclaimed as a "calculator on a chip"), the Mostek MK6010, and the first electronic calculator to run off replaceable batteries. Using four AA-size cells the LE-120A measures 4.9 by 2.8 by 0.9 inches ...
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