Transcript
Chapter 5BTECH1101 | Fundamental of Computer Systems
Prepared by Mohamed Abdulkarim
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Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer SystemsChapter 5 Objectives
List the characteristics of a keyboard
Summarize how these pointing deviceswork: mouse, trackball, touchpad, pointing stick, light pen, touch screen, stylus, digital pen, and gaming and
media player controllers
Describe other types of input, including voice input; input devices for PDAs, smart phones, and Tablet PCs;
digital cameras; video input; scanners and reading devices; terminals; and biometric input
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BTECH1101 | Fundamental of Computer SystemsWhat Is InputWhat is input?
Input device is any hardware component that allows users to enter data and
instructions
Data or instructions entered into the memory of computer
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BTECH1101 | Fundamental of Computer SystemsKeyboard and Pointing DevicesWhat is a keyboard?
Input device that contains keys users press to
enter data into a computer
Includes typing area, function keys
Can be cordless or built-in
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BTECH1101 | Fundamental of Computer SystemsKeyboard and Pointing DevicesWhat is a mouse?
Pointing device that fits under the palm of your hand
Pointing device controls movement of
pointer
Mechanical mouse
has rubber or metal
ball on its underside
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BTECH1101 | Fundamental of Computer SystemsKeyboard and Pointing DevicesWhat is an optical mouse?
No moving mechanical parts
inside
Senses light to detect mouse’s
movement
More precise than mechanical
mouse
More expensive than a mechanical
mouse
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BTECH1101 | Fundamental of Computer SystemsKeyboard and Pointing DevicesWhat is a trackball?
Stationary pointing device with a ball on its top
or side
To move pointer, rotate ball with thumb,
fingers, or palm of hand
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BTECH1101 | Fundamental of Computer SystemsKeyboard and Pointing DevicesWhat are a touchpad and a pointing stick?
Touchpad is small, flat, rectangular pointing
device sensitive to pressure and motion
Pointing stick is pointing device shaped like pencil
eraser positioned between keys on keyboard
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BTECH1101 | Fundamental of Computer SystemsKeyboard and Pointing DevicesWhat is a light pen?
Handheld input device that can detect the presence of light
Press light pen against screen surface and then press button on pen
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BTECH1101 | Fundamental of Computer SystemsKeyboard and Pointing DevicesWhat is a touch screen? Touch areas of screen with finger
Often used with kiosks
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BTECH1101 | Fundamental of Computer SystemsKeyboard and Pointing DevicesWhat is a digital pen?
Looks like a ballpoint pen, but uses pressure to write text and draw lines
Used with graphics tablets, flat electronic boards
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BTECH1101 | Fundamental of Computer SystemsGaming and Media Player ControllersWhat are the types of game controllers?
Gamepad
Joystick
Wheel
Light gun
Dance pad
Motion-sensing game controller
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BTECH1101 | Fundamental of Computer SystemsGaming and Media Player ControllersWhat is a touch-sensitive pad?
Input device on a portable media player
that enables users to scroll through and
play music, view pictures, watch videos
or movies, adjust volume, and customize
settings
Click Wheel
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BTECH1101 | Fundamental of Computer SystemsOther Types of Input
What is voice input?
Entering input by speaking into a microphone
Voice recognition or speech recognition is the
computer’s capability to distinguish spoken words
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BTECH1101 | Fundamental of Computer SystemsOther Types of Input
What is audio input?
Entering sounds into a computer - speech,
music, and sound effects
MIDI - standard defining how digital musical
devices represent sound electronically
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputHow is data entered into a PDA?
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is a smart phone?
Users can input and send text messages, graphics, pictures, video clips, and
sound files
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is a Tablet PC?
Mobile computer
Primary input device is a pressure-
sensitive digital pen
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is a digital camera?
Allows you to take digital
pictures
Images viewable immediately on
camera
Download to computer
Post pictures to Web
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is video input?
Process of capturing full-motion images and storing them on a computer’s
storage medium
Digital video (DV) camera records video as digital signals
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is a PC video camera and a Web cam?
PC video camera - Digital Video camera used to capture video and still images, and to
make video telephone calls on Internet
Also called PC camera
Web cam - video camera that displays its
output on a Web page
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is video conferencing?
Two or more geographically separated people who use a network or the
Internet to transmit audio and video data
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is a scanner? Light-sensing device that reads printed text and graphics
Used for image processing, converting paper documents into
electronic images
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is a turnaround document?
Document that you return to the
company that sent it
Portion you return has
information printed in OCR
characters
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is an optical reader?
Optical character recognition (OCR)
reads typewritten characters
Optical mark recognition (OMR) reads
hand-drawn pencil marks, such as small
circles
Bar code reader
Device that uses light source to read characters, marks, and codes and then converts
them into digital data
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is an RFID reader?
Reads information on the tag via audio
waves
Can be handheld devices or
mounted in a stationary object
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is a magnetic stripe card reader?
Reads the magnetic stripe on the
back of a credit card
Exposure to a magnetic field can
erase the contents of a card’s
magnetic stripe
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BTECH1101 | Fundamental of Computer Systems
What is a magnetic-ink character recognition (MICR) reader?
Other Types of Input
Can read text printed with magnetized ink
Banking industry almost exclusively uses MICR for check processing
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is a point of sale (POS) terminal?
Records purchases, processes credit or debit cards, and updates inventory
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is an automated teller machine (ATM)? Self-service banking machine that connects to a host computer through a network
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat is biometrics?
Authenticates person’s identity by verifying a
personal characteristic
Fingerprint scanner captures curves and
indentations of a fingerprint
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BTECH1101 | Fundamental of Computer SystemsOther Types of InputWhat are examples of biometric technology?
Voice verification system compares live speech with stored voice
pattern
Signature verification system recognizes
shape of signature
Iris recognition system reads patterns in blood
vessels in back of eye
Biometric data is sometimes stored on smart
card, which stores personal data on
microprocessor embedded in card
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BTECH1101 | Fundamental of Computer Systems
End of Lecture
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