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Parts of a Сomputer

A computer is an electronic machine that accepts, processes,

stores and outputs information. A typical computer consists of two

parts: hardware and software.

Hardware: is any electronic or mechanical part of the com-

puter system that you can see or touch.

Software is a set of instructions called a program, which tells

a computer what to do.

There are three basic hardware sections.

1. The CPU is the heart of the computer, a microprocessor

chip which processes data and coordinates the activities of all the

other units. In a way, it is the “brain” of the computer.

2. The main memory holds the instructions and data which

are being processed by the CPU. It has two main sections: RAM

(random access memory) and ROM (read only memory).

3. Peripherals are the physical units attached to the computer.

These can include input devices, output devices, storage devices

and communications devices.

Input devices, which let us enter data and commands (e.g.

keyboards, mouses, scanners, barcode readers, microphones,

webcams (small digital video cameras used on the Web).

Output devices, which let us extract the results (e.g. monitors,

printers, plotters, loudspeakers, headphones).

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