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abigail mota

on 13 May 2010

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Transcript of computer

The system unit is the core of the computer system usually its a rectanglur box underneath your desk.
A computer monitor is an electronic device that shows pictures. A monitor is usually used to see programs on a computer. The main difference between a monitor and a television is that a monitor does not have a television tuner to change channels. A monitor may be used to watch television if it is connected to a device that has a television tuner. Some models of monitor can be used as a television, and some televisions are used with computers. A monitor has a better display resolution than a television to make it easier to see smaller letters and graphics on.

A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from driven diodes to radio.

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