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Volume 1Volume 1

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KeyboardKeyboardEnter commands and characters, move a screen cursor or control program running.

(i) QWERTY keyboard

function keys

special keys

numeric pad

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(ii) Dvorak keyboard

Letters are positioned for speed typing

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Move a mouse Move a mouse pointer, click or pointer, click or select a screen area, select a screen area, scroll through long scroll through long documents, and even documents, and even enter predefined enter predefined commands.commands.

Pointing StickPointing Stick

Touch PadTouch Pad

MouseMouse

TrackballTrackball

JoystickJoystick

GamepadGamepad

Move a pointer or Move a pointer or some other display some other display symbols in different symbols in different directions.directions.

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Use the light pen to select Use the light pen to select objects on a display screen.objects on a display screen.

Display Screen and Light PenDisplay Screen and Light Pen

Touch Screen and StylusTouch Screen and StylusUse a stylus or a finger to Use a stylus or a finger to select objects and enter select objects and enter data on a touch screen.data on a touch screen.

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Digitizer and PuckDigitizer and PuckA puck is used to A puck is used to draw graphics on a draw graphics on a digitizer, or act as a digitizer, or act as a mouse.mouse.

Voice Input DeviceVoice Input Device

Receive voice signals Receive voice signals and transmit them to and transmit them to the computer for the computer for processing.processing.

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Optical ScannerOptical ScannerRead text or images and translate the data into digital Read text or images and translate the data into digital form.form.

((i) Overheadi) Overhead

((ii) handheldii) handheld

((iii) flatbediii) flatbed

((iv) sheet-fediv) sheet-fed

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Digital CameraDigital Camera

CamcorderCamcorderRecord video and to Record video and to generate a digital generate a digital signal for display or signal for display or recording.recording.

Record images in digital Record images in digital form.form.

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WebCamWebCam((i) homei) home(ii) public-place(ii) public-place

Capture periodic or continuous Capture periodic or continuous images for display.images for display.

MICRMICR

Read characters Read characters printed in magnetic printed in magnetic ink.ink.

OCROCRRead an image and convert the Read an image and convert the characters in the image into a text characters in the image into a text format.format.

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Bar Code ReaderBar Code ReaderRead bar codes and convert Read bar codes and convert them into the ASCII or the them into the ASCII or the EBCDIC.EBCDIC.

e.g. Bar cords on books or on e.g. Bar cords on books or on the products sold in the the products sold in the supermarket.supermarket.

Magnetic Stripe Card ReaderMagnetic Stripe Card Reader

Read magnetic stripes adhered to cards.Read magnetic stripes adhered to cards.

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Smart Card ReaderSmart Card Reader

A smart card reader is used to read data on smart cards.A smart card reader is used to read data on smart cards.

An example of An example of smart card smart card readerreader

There are different types of smart cards.There are different types of smart cards.

((i) contact smart card i) contact smart card e.g. telephone e.g. telephone cardcard

((ii) contactless smart card ii) contactless smart card e.g. Octopus e.g. Octopus cardcard

((iii) hybrid smart card iii) hybrid smart card e.g. student identity card e.g. student identity card

((iv) combi smart card e.g. credit cardiv) combi smart card e.g. credit card

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There are many types of input devices There are many types of input devices

nowadays. However, senses like smell nowadays. However, senses like smell

still do not have input device to input still do not have input device to input

the data into a computer. Try to design the data into a computer. Try to design

an input device with your classmate and an input device with your classmate and

discuss how it works.discuss how it works.

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