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2. Monroe Systems for Business - Wikipedia

   en.wikipedia.org/wiki/Monroe_Systems_for_Business

   Monroe Systems for Business is a provider of electric calculators, printers, and office accessories such as paper shredders to business clients. [1] Originally known as the Monroe Calculating Machine Company, it was founded in 1912 by Jay Randolph Monroe as a maker of adding machines and calculators based on a machine designed by Frank Stephen Baldwin.

3. Victor Technology - Wikipedia

   en.wikipedia.org/wiki/Victor_Technology

   victortech .com. Victor Technology LLC (also known as Victor Calculator) is a supplier of printing calculators, scientific calculators, financial calculators, basic calculators, and desktop accessories with headquarters in Bolingbrook, Illinois. Victor products are sold primarily throughout the United States, Canada, and Puerto Rico through ...

4. Mechanical calculator - Wikipedia

   en.wikipedia.org/wiki/Mechanical_calculator

   The mechanical calculator industry started in 1851 Thomas de Colmar released his simplified Arithmomètre, which was the first machine that could be used daily in an office environment. For 40 years, [ 58] the arithmometer was the only mechanical calculator available for sale and was sold all over the world.

5. Friden, Inc. - Wikipedia

   en.wikipedia.org/wiki/Friden,_Inc.

   Friden Calculator Friden Flexowriter. In 1957, Friden purchased the Commercial Controls Corporation of Rochester, New York.This gave them the Flexowriter teleprinter, an electric typewriter capable of being used as part of unit record equipment developed in World War II for the Department of the Navy to automatically type "regret to inform you" letters to the survivors of fallen servicemen ...

6. HP-67/97 - Wikipedia

   en.wikipedia.org/wiki/HP-67/97

   height: 0.7–1.4 inches (18–36 mm) The HP-67 is a magnetic card-programmable handheld calculator, introduced by Hewlett-Packard in 1976 at an MSRP of $450. [ 1] A desktop version with built-in thermal printer was sold as the HP-97 at a price of $750. [ 2] Collectively, they are known as the HP-67/97. [ 3]

7. HP-35 - Wikipedia

   en.wikipedia.org/wiki/HP-35

   Was the first scientific calculator to fly in space in 1973. [5] HP-35 calculators were carried on the Skylab 3 and Skylab 4 flights, between July 1973 and February 1974. [6] Is the first pocket calculator with a numeric range that covered 200 decades (more precise 199, ±10 ±99). [5]