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speakers

projectors

buzzers

motors

switched outputs

lights

mechanical devices, eg a robot arm

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A plotter can be used to produce high quality, accurate, A3 size or bigger drawings

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Laser Printer

Ink-Jet Printer

Dot Matrix Printer

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The most common output device is the monitor or VDU.

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They let the computer communicate with the user.

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Common output formats are printed paper, sound, video and on-screen documents.

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CPU's aren’t only found in desktop or laptop computers, many electronic devices now rely on them for their operation.

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The CPU is responsible for executing a sequence of stored instructions called a program. This program will take inputs from an input device, process the input in some way and output the results to an output device.

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The CPU is also known as the processor or microprocessor.

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This is the part of a computer system that is commonly referred to as the "brains" of a computer.

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An OMR reads marks made by pencil on a printed form into the computer.

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Magnetic stripes are built into many plastic cards such as debit or credit cards and personal identity cards.

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Barcodes are represented by black vertical bars and are read by a barcode reader.

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Many mobile phones have touch screens. Using a touch sensitive visual display unit.

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Used to take pictures.

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Most popularly used by gamers to play video games.

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To operate it the user rotates the ball which moves the pointer on screen.

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Each button on a concept keyboard relates to a particular item or function

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Most common manual input devices are a mouse and keyboard.