INPUT AND OUTPUT DEVICES

Haazim Riyaz5th Blue

Roll No. 27

WHAT IS AN INPUT DEVICE? Any machine that feeds data into a computer is called an Input

Device.

Any device that interacts to any system and allows you to enter the information on the computer.

An input device is a hardware or peripheral device used to send data to a computer. 

An input device allows users to communicate and feed instructions and data to computers for processing, display, storage and/or transmission.

INPUT DEVICES:

MOUSE

• A Mouse is a hand controlled pointing device which moves a pointer on a display.

• A Mouse consists of an object held in one's hand, with one or more buttons.

• A Mouse often also features other elements, such as touch surfaces and wheels.

• The Mouse turns movements of the hand backward and forward, left and right into equivalent electronic signals that in turn are used to move the pointer.

INPUT DEVICES:

KEYBOARD

• A keyboard is a typewriter-style device which uses buttons or keys to act as

  a mechanical lever or electronic switch.

• A keyboard typically has characters engraved or printed on the keys and each press of a key typically corresponds to a single written symbol.

• A keyboard is a panel of keys that operate a computer or typewriter.

INPUT DEVICES:

JOYSTICK

• A Joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling.

• The electrical two-axis joystick was invented by C. B. Mirick.

• The name "joystick" is believed to have been coined by a French pilot Robert Esnault-Pelterie. 

WHAT IS AN OUTPUT DEVICE? An output device is any piece of computer hardware equipment

used to communicate the results of data processing carried out by an information processing system (such as a computer) which converts the electronically generated information into human-readable form.

An output device is any peripheral that receives data from a computer usually for display or projection.

An output device is a piece of hardware that is used to output data that has been previously entered into a computer or similar processing device.

OUTPUT DEVICES:

MONITOR

• A Monitor is the piece of computer hardware that displays the video and graphics information generated by the computer.

• A monitor usually comprises the display device, circuitry, casing, and power supply. 

• The display device in modern monitors is typically TFT-LCD or LED display, while older monitors used a CRT display.

OUTPUT DEVICES:

PRINTER

• A Printer is a peripheral which prints a human readable representation of graphics or text on a paper.

• The world's first computer printer was invented by Charles Babbage.

• The two most common printer mechanisms are black and white laser printers and color inkjet printers.

OUTPUT DEVICES:

SPEAKER

• A Speaker is a device which converts an electrical audio signal into a corresponding sound.

• Speakers are typically housed in an enclosure which plays an important role in the quality of the sound. 

• The most widely used type of speaker today was invented in 1925 by Edward W. Kellogg and Chester W. Rice.

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