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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.
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 ...
The following table compares general and technical information for a selection of common and uncommon Texas Instruments graphing calculators. Many of the calculators in this list have region-specific models that are not individually listed here, such as the TI-84 Plus CE-T, a TI-84 Plus CE designed for non-French European markets.
The Master Library Module shown removed from its socket in the back of the calculator. Magnetic card storage folio also shown. The TI-59 and TI-58 were the first hand-held calculators to utilize removable ROM program modules. The Master Library Module ROM was included with the TI-59 and TI-58, and contains several useful pre-programmed routines ...
Scan-based trading (SBT) is the process by which suppliers maintain ownership of inventory within retailers' warehouses or stores until items are scanned at the point of sale. Suppliers, such as manufacturers or farmers, own the product until it is purchased by the customer, with the store or venue then buying the product from the supplier and ...
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The Hand Held Products company, established in 1981 in Charlotte, North Carolina, began as a manufacturer of memory modules for Hewlett-Packard and Texas Instruments programmable calculators, and grew rapidly from 1983 thanks to an RFP hand-off by Hewett-Packard, as the package delivery company Federal Express selected their Micro-Wand portable data collection device to begin a proof of ...