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Verfasst von hsuais am 1. Juni 2012 - 10:30.

 Calculator generally by the operator, controller, memory, display, keyboard, power supply and some optional peripherals and electronic accessories through the manual or machine equipment. Low calculator arithmetic unit, controller by a digital logic circuit to realize a simple serial arithmetic, the random access memory only one or two units, for the accumulation of storage. High-end calculator consists of microprocessor and programmable read-only memory to achieve a variety of complex operation procedures, has many random storage unit for storing input and data. The keyboard is the calculator input components, generally adopts the contact type or sensing type. In order to reduce the size of a calculator, often have a number of functions. The display is the calculator output component, a light emitting diode display or a liquid crystal display. In addition to display results, also often overflow indication, error indication. Computer power supply AC converter or battery, battery available AC converter or solar energy recharging. In order to save electric energy, calculator with CMOS technology of production of large scale integrated circuit (see complementary metal oxide semiconductor integrated circuit ), and in the interior of a timing automatic power-off circuit does not operate. Calculator can be selected peripheral device has a miniature printer, tape cassette and magnetic card machine.

This is a small calculator program machine is actually from the computer from the derivatives, but because of its convenient and efficient mode of operation, has been widely used in engineering, business, study, daily life, a great convenience to people for digital integrated  Replica Watches operation.


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