Input is any data and instructions entered into the memory of a computer.

Input Device is any hardware component that allows users to enter data and instructions into a computer.

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Input And OutputChap

ter 5

Keyboard and pointing devicespointing devices:

Mouse is a pointing device because it allows a user to control a pointer on the screen.

In GUI, a pointer is a small symbol on the screen whose location and shape change as a user moves a pointing device.

a pointing device can select text, graphics and other objects and click buttons, icons, links and menu commands.

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Input DevicesChap

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Input Devices

KeyboardCable keyboard

Wireless keyboard

Pointing Devices

MouseMechanical

OpticalTrackball

Touchpad

Pointing Stick

Light Pen

Touch Screen

Pen Input

Audio Input

Digital Camera

Scanner and reading devices

Optical Scanner

Optical Reader

Barcode Reader

RFID reader

Magnetic strip card readers

MIRC reader

Biometric Input Physical

Behavioral

Input Devices Categories

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Chap

ter 5

There are 2 types: mechanical mouse and

Optical mouse. Mechanical mouse has a rubber or metal

ball on its underside. You should place a mechanical mouse on a mouse

pad. Mouse pad is a rectangular rubber or foam pad

that provides better traction than the top of a desk Optical mouse uses devices that emit and

sense light to detect the mouse’s movement. Some use optical sensors; other use laser.

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MouseChap

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Is a stationary pointing

device with a ball on its top or side, Similar to a mechanical mouse that has a ball on the bottom.

To move the pointer using a trackball, you rotate the ball with your thumb, fingers or the palm of your hand.

It has one or more buttons that work just like mouse buttons.

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TrackballChap

ter 5

Is a small, flat, rectangular

pointing device that is sensitive to pressure and motion.

To move the pointer, slide your fingertip across the surface of the pad.

You also can tap the pad’s surface to imitate mouse operations such as clicking.

Around the edge of the pad there are one or more buttons that work like mouse buttons.

Touchpad's are found most often on notebook computers.

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TouchpadChap

ter 5

Is a pressure-sensitive

pointing device shaped like a pencil eraser that is positioned between keys on a keyboard.

To move the pointer you push the pointing stick with a finger.

IBM developed the pointing stick for its notebook computers.

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Pointing StickChap

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Light Pen

Is a handheld pointing device that detect the presence of light.

To select objects on the screen,

a user press the light pen against the surface of the screen

or points the light pen at the screen and then press a button on the pen.

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Is an input device that contains keys users

press to enter data and instructions into a computer.

Typing area Numeric keypad Function Keys Media control buttons Internet control

Desktop computer keyboard often attach to the System Unit using

Cable: a serial port or USB port. Without cables :Ir or Bluetooth

Wireless keyboard or cordless keyboard, is a buttery-powered device that transmits data using wireless technology

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The KeyboardChap

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Is a touch-sensitive

display device. Users can interact

with these device by touching areas of the screen.

Because touch screens require a lot of arm movements, you do not enter large amounts of data using a touch screen.

Many handheld game consoles have touch screens.

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Touch screenChap

ter 5

Mobile users often enter

data and instructions with a pen-type device.

With pen input ,users write, draw, and tap on a flat surface to enter input.

The surface maybe a monitor, a screen, a special type of paper or graphic tablet.

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Pen InputChap

ter 5

Is the process of entering any sound

into the computer such as speech, music, and sound effects.

User enter sound into computer via devices such as

microphones tape players CD/DVD players radios 15

Audio InputChap

ter 5

Digital Cameras

Allows users to take pictures and store the photographed image digitally instead of on traditional film.

They use internal flash memory to store images.

Others store images on mobile storage media, including a flash memory, memory stick and mini CD/DVD.

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Other Types of InputChap

ter 5

A digital

camera's resolution is defined in pixels.

The greater the number of pixels the camera uses to capture an image, the better the quality of the image.

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Digital CamerasChap

ter 5

Some input devices save time by

capturing data directly from a source document.

1. Optical scanner2. Optical readers3. Bar code readers4. RFID readers5. Magnetic strip card readers6. Magnetic-ink character

recognition reader.18

Scanners and Reading DevicesChap

ter 5

Usually called a scanner

Is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can process.

Many scanner include OCR ( optical character recognition ) software, which can read and convert text documents into electronic files.

OCR SW converts a scanned image into a text file that can be edited.

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1 -Optical scanner Chap

ter 5

Is a device that uses a light source to

read characters, marks andcodes and then converts them into

digital data that a computer canprocess.

Two technologies used by optical readers are

A.Optical character recognition.B.Optical mark recognition. 20

2 -Optical ReadersChap

ter 5

Involves reading

handwritten, typewritten or printed text and translating the image into a form the computer can process.

Most OCR devices include a small optical scanner for reading characters and sophisticated SW to analyze what read.

It range from large machines that can read thousands of documents per minute to handheld that read one document at a time.

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A- Optical character recognition (OCR)

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B- Optical mark recognition (OMR)

Devices read hand-drawn marks such as small circles or rectangles.

One of the most familiar applications of optical mark recognition is the use of pencil bubble optical answer sheets in multiple choice question examinations.

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3 -Bar Code Readers

also called bar code scanner is an electronic device that

uses laser beams for reading printed barcodes.

Bar code is an identification code that consists of set of vertical lines and spaces of different widths.

The bar code represent the data that identifies the manufacturer and the item.

Chap

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Radio-frequency identification

readers is a technology that uses radio

signals to communicate with a tag placed in or attached to an object, an animal, or a person.

RFID tags, which contain a memory chip and an antenna, are available in many shapes and size.

RFID reader reads information on the tag via radio waves. It can be handheld devices or mounted in a stationary object such as a doorway.

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4 -RFID ReadersChap

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Many retailer see RFID

as an alternative to bar code identification because it dose not require direct contact or line-of-site transmission.

Other uses of RFID include tracking times of runners in a marathon; tracking location of soldiers, and airline baggage.

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RFID ReadersChap

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Often called a magstripe reader Reads the Magnetic strip on the

back of credit cards or other similar cards.

The strip contains information identifying you.

Some information stored in the strip includes your name, account number, the card expiration date, and a country code.

If the Magnetic strip card readers rejects your card, it is possible that the Magnetic strip is scratched, dirty or erased.

Exposure to magnetic field can erase the contents of a card’s magnetic stripe.

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5 -Magnetic strip card readersChap

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Magnetic-ink character recognition

Devices read text printed with magnetized ink.

MICR reader converts MIRC characters into a form the computer can process.

The banking industry almost exclusively uses MICR for check processing.

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6 -MICR Reader Chap

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Bank routing no. Account no. Check no. Check amount.

Is the technology of

authenticating a person’s identity by verifying a personal characteristic.

Biometric devices grant users access to programs, systems, or rooms by analyzing some physiological or behavioral characteristic.

such as fingerprints, eye patterns, voice patterns, facial features, signatures and hand geometry.

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Biometric InputChap

ter 5

Biometric Input

Fingerprint scanner

Face recognition system

Hand geometry system

Voice verification system

Signature verification system

Iris recognition system

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