Using Information Technology Chapter 6 Hardware: Input & Output. - презентация

1 Using Information Technology Chapter 6 Hardware: Input & Output

2 Hardware--Input & Output 2 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Hardware--Input & Output Taking Charge of Computing & Communications 6.1Input & Output 6.2Input Hardware 6.3Output Hardware 6.4The Future of Input & Output 6.5Input & Output Technology & Quality of Life: Health & Ergonomics

3 Hardware--Input & Output 3 Copyright © 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

4 Hardware--Input & Output 4 Copyright © 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 computers processor Braille keyboard

5 Hardware--Input & Output 5 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Keyboards Traditional computer keyboards Specialty keyboards and terminals Dumb terminals Intelligent terminals Internet terminals Dumb terminal

6 Hardware--Input & Output 6 Copyright © 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

7 Hardware--Input & Output 7 Copyright © 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

8 Hardware--Input & Output 8 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Pointing Devices The mouse and its variants: Mouse Trackball Pointing stick Touchpad Ergonomic trackball

9 Hardware--Input & Output 9 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Pointing Devices The mouse and its variants: Mouse Trackball Pointing stick Touchpad Pointing stick

10 Hardware--Input & Output 10 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Pointing Devices The mouse and its variants: Mouse Trackball Pointing stick Touchpad

11 Hardware--Input & Output 11 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Pointing Devices Touch screens

12 Hardware--Input & Output 12 Copyright © 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

13 Hardware--Input & Output 13 Copyright © 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

14 Hardware--Input & Output 14 Copyright © 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

15 Hardware--Input & Output 15 Copyright © 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

16 Hardware--Input & Output 16 Copyright © 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

17 Hardware--Input & Output 17 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Scanning and Reading Devices Mark-recognition and character-recognition devices – sense marks or characters MICRMICR - character recognition system that uses magnetic ink and special characters OMR OCR

18 Hardware--Input & Output 18 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Scanning and Reading Devices Mark-recognition and character-recognition devices: MICR OMROMR - uses a device that reads bubble marks and converts them into computer-usable form OCR

19 Hardware--Input & Output 19 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Scanning and Reading Devices Mark-recognition and character- recognition devices: MICR OMR OCROCR - converts scanned text from images to an editable text format that can be imported into a word processing application and manipulated

20 Hardware--Input & Output 20 Copyright © 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

21 Hardware--Input & Output 21 Copyright © 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

22 Hardware--Input & Output 22 Copyright © 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

23 Hardware--Input & Output 23 Copyright © 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

24 Hardware--Input & Output 24 Copyright © 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

25 Hardware--Input & Output 25 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Speech-Recognition Systems Speech-recognition system - converts a persons speech into digital signals

26 Hardware--Input & Output 26 Copyright © 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

27 Hardware--Input & Output 27 Copyright © 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

28 Hardware--Input & Output 28 Copyright © Exclusive rights by The McGraw-Hill Companies, Inc. Human-Biology-Input devices BiometricsBiometrics - the science of measuring individual body characteristics Screen of face recognition system Palm print recognition reader