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A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
However, there were problems with this display and the calculator never went on sale. The first successful calculators with LCDs were manufactured by Rockwell International and sold from 1972 by other companies under such names as: Dataking LC-800, Harden DT/12, Ibico 086, Lloyds 40, Lloyds 100, Prismatic 500 (a.k.a. P500), Rapid Data Rapidman ...
A pinwheel calculator is a class of mechanical calculator described as early as 1685, and popular in the 19th and 20th century, calculating via wheels whose number of teeth were adjustable. These wheels, also called pinwheels, could be set by using a side lever which could expose anywhere from 0 to 9 teeth, and therefore when coupled to a ...
1100-3A - The 1100-3A is a black and grey/gray 3.2 oz. desktop calculator made with 50% recycled plastic and has a 10 digit angled LCD display. It has 3-key independent memory and tax keys. [11] 1180-3A - The 1180-3A is a 4.8 oz black desktop calculator with a 12 digit angled LCD display. It is made with 40% recycled plastic and it has cost ...
HP-17B code name was Trader and it belonged to the Pioneer series of Hewlett-Packard calculators. [2] It had a 131×16 LCD dot matrix, 22×2 characters, menu-driven display, [3] used a Saturn processor and had a memory of 8000 bytes, of which 6750 bytes were available to the user for variable and equation storage.
HP-65 in original hard case with manuals, software "Standard Pac" of magnetic cards, soft leather case, and charger. The HP-65 is the first magnetic card-programmable handheld calculator.
The HP 30b (NW238AA, variously codenamed "Big Euro", "Mid Euro" and "Fox" [1]) is a programmable [2] financial calculator from HP which was released on 7 January 2010. [3] The HP 30b is an advanced version of the HP's prior model HP 20b.
The Millionaire (calculator) Tide-Predicting Machine No. 2 This page was last edited on 25 September 2022, at 00:20 (UTC). Text is available under the Creative ...