Using Information Technology презентация

Содержание

Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc. Hardware--Input & Output Taking Charge of Computing & Communications 6.1 Input & Output 6.2 Input Hardware 6.3 Output Hardware

Слайд 1Using Information Technology
Chapter 6
Hardware: Input & Output

Слайд 2Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Hardware--Input &

Output Taking Charge of Computing & Communications



6.1 Input & Output

6.2 Input Hardware

6.3 Output Hardware

6.4 The Future of Input & Output

6.5 Input & Output Technology & Quality of Life: Health & Ergonomics


Слайд 3Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
6.1 Input

& Output

Input hardware - devices that translate data into a form the computer can process

Output hardware - devices that translate information processed by the computer into a form that humans can understand



Слайд 4Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
6.2 Input

Hardware

Keyboard - a device that converts letters, numbers, and other characters into electrical signals that can be read by the computer’s processor





Braille keyboard

Слайд 5Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Keyboards
Traditional computer

keyboards

Specialty keyboards and terminals

Dumb terminals
Intelligent terminals
Internet terminals


Dumb terminal

Слайд 6Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Keyboards
Specialty keyboards

and terminals:

Dumb terminal:
Airline reservations

Intelligent terminal:
Automatic teller machine (ATM)
Point-of-sale (POS) terminal

Internet terminal:
Set-top box
PDA



Point-of-sale (POS) terminal

Слайд 7Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Pointing Devices
Pointing

devices - control the position of the cursor or pointer on the screen

Mouse
Trackball
Pointing stick
Touchpad





Mouse for a right-handed user

Слайд 8Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Pointing Devices
The

mouse and its variants:

Mouse
Trackball
Pointing stick
Touchpad





Ergonomic trackball

Слайд 9Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Pointing Devices
The

mouse and its variants:

Mouse
Trackball
Pointing stick Touchpad





Pointing stick

Слайд 10Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Pointing Devices
The

mouse and its variants:

Mouse
Trackball
Pointing stick
Touchpad





Touch pad

Слайд 11Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Pointing Devices




Touch

screens

Слайд 12Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Pointing Devices
Pen

input:

Pen-based computer system - allows users to enter handwriting and marks onto a computer screen by means of a penlike stylus rather than by typing on a keyboard





Pen-based computer

Слайд 13Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Pointing Devices
Pen

input:

Light pen - a light-sensitive penlike device that uses a wired connection to a computer terminal




Light pen

Слайд 14Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Pointing Devices
Pen

input:

Digitizer - converts drawings and photos to digital data using a mouselike device called a puck





Digitizing tablet

Слайд 15Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Scanning and

Reading Devices

Source data-entry devices – create machine-readable data

Scanners - use light-sensing equipment to translate images of text, drawings, photos, and the like into digital form






Слайд 16Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Scanning and

Reading Devices

Bar-code readers:

Bar codes - photoelectric scanners that translate the symbols in the bar code into digital code








Слайд 17Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Scanning and

Reading Devices

Mark-recognition and character-recognition devices
– sense marks or characters

MICR - character recognition system that uses magnetic ink and special characters

OMR

OCR








Слайд 18Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Scanning and

Reading Devices

Mark-recognition and character-recognition devices:

MICR

OMR - uses a device that reads bubble marks and converts them into computer-usable form

OCR







Слайд 19Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Scanning and

Reading Devices

Mark-recognition and character-recognition devices:

MICR

OMR

OCR - converts scanned text from images to an editable text format that can be imported into a word processing application and manipulated







Слайд 20Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Scanning and

Reading Devices

Fax machine – scans an image and sends it as electronic signals over telephone lines to a receiving fax machine

Types of fax machines:

Dedicated fax machine

Fax modem











Dedicated fax machine

Слайд 21Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Source Data-Entry

Devices

Types of fax machines:

Dedicated fax machine

Fax modem









Fax modem circuit board

Слайд 22Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Audio-Input Devices
Audio-input

device - records analog sound and translates it for digital storage and processing

Digitizing an audio signal:

sound board

MIDI board






Слайд 23Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Webcams &

Video-Input Cards

Webcam – a video camera attached to a computer to record moving images that can be posted on a website in real time

Video cards:

Frame-grabber video card

Full-motion video card






Слайд 24Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Digital Cameras
Digital

camera - uses a light-sensitive processor chip to capture photographic images in digital form and store them on a small diskette








Digital camera attached to a computer

Слайд 25Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Speech-Recognition Systems
Speech-recognition

system - converts a person’s speech into digital signals











Слайд 26Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Sensors
Sensor –

an input device that collects specific data directly from the environment and transmits it to a computer








Слайд 27Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Radio-Frequency Identification

Tags

RFID tags – based on an identifying tag bearing a microchip that contains specific code numbers









A tollbooth with RFID readers

RFID tag in a car for paying toll

Слайд 28Copyright © 2005. Exclusive rights by The McGraw-Hill Companies, Inc.
Human-Biology-Input devices
Biometrics

- the science of measuring individual body characteristics









Screen of face recognition system

Palm print recognition reader

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