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Living in a Digital World
Discovering Computers 2010
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Objectives Overview
Discovering Computers 2010: Living in a Digital World Chapter 5
2See Page 257 for Detailed Objectives
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Objectives Overview
Discovering Computers 2010: Living in a Digital World Chapter 5
3See Page 257 for Detailed Objectives
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What Is Input?
• Input is any data and instructions entered into the memory of a computer
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What Is Input?
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• Instructions can be entered into the computer in the form of programs, commands, and user responses
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What Are Input Devices
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The Keyboard
• A keyboard is an input device that contains keys users press to enter data and instructions into a computer
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The Keyboard
Discovering Computers 2010: Living in a Digital World Chapter 5
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• Most desktop computer keyboards have…
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The Keyboard
• The insertion point, also known as the cursor, is a symbol on the screen that indicates where the next character you type will appear
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The Keyboard
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The Keyboard
• An ergonomic keyboard has a design that reduces the chance of wrist and hand injuries
• Ergonomics incorporates comfort, efficiency, and safety into the design of the workplace
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Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Ergonomics below Chapter 5
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The Keyboard
• Keyboards on mobile devices typically are smaller and/or have fewer keys
• Some phones have predictive text input, which saves time when entering text using the phone’s keypad
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Pointing Devices
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Mouse
• A mouse is a pointing device that fits under the palm of your hand comfortably– Most widely used pointing device on desktop
computers
• A mouse can be wired or wireless
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Other Pointing Devices
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Touch Screens and Touch-Sensitive Pads
• A touch screen is a touch-sensitive display device
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Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Multi-Touch Screensbelow Chapter 5
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Touch Screens and Touch-Sensitive Pads
Microsoft Surface Touch-sensitive pads
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Pen Input
• With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections
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Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Signature Capture Pads below Chapter 5
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Other Input for Smart Phones
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Game Controllers
• Video games and computer games use a game controller as the input device that directs movements and actions of on-screen objects
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Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Wii Remote below Chapter 5
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Game Controllers
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Digital Cameras
• A digital camera is a mobile device that allows users to take pictures and store them digitally
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Digital Cameras
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Digital Cameras
• Two factors affect the quality of digital camera photos:
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Voice Input
• Voice input is the process of entering input by speaking into a microphone
• Voice recognition is the computer’s capability of distinguishing spoken words
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Voice Input
• Audio input is the process of entering any sound into the computer
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Voice Input
• Music production software allows users to record, compose, mix, and edit music and sounds
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Video Input
• Video input is the process of capturing full-motion images and storing them on a computer’s storage medium
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Video Input
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Video: Video Editing on Your Computer
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CLICK TO START
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Video Input
• A Web cam is a type of digital video camera that enables a user to:
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Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Web Camsbelow Chapter 5
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Video Input
• A video conference is a meeting between two or more geographically separated people
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Scanners and Reading Devices
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Scanners and Reading Devices
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Scanners and Reading Devices
• Optical character recognition (OCR) involves reading characters from ordinary documents
• A turnaround document is a document you return to the company that creates and sends it
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Scanners and Reading Devices
• Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles
• An OMR device scans the documents and matches the patterns of light
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Scanners and Reading Devices
• A bar code reader, also called a bar code scanner uses laser beams to read bar codes
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Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Bar Code Readersbelow Chapter 5
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Scanners and Reading Devices
• RFID (radio frequency identification) uses radio signals to communicate with a tag placed in or attached to an object
• An RFID reader reads information on the tag via radio waves • RFID can track:
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Scanners and Reading Devices
• Magnetic stripe card readers read the magnetic stripe on the back of cards such as:
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Scanners and Reading Devices
• MICR (magnetic ink character recognition) devices read text printed with magnetized ink
• An MICR reader converts MICR characters into a form the computer can process
• Banking industry uses MICR for check processing
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Scanners and Reading Devices
• Data collection devices obtain data directly at the location where the transaction or event takes place
• Used in:– Restaurants– Grocery stores– Factories– Warehouses– The outdoors
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Biometric Input
• Biometrics authenticates a person’s identity by verifying a personal characteristic
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Biometric Input
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Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Biometric Inputbelow Chapter 5
fingerprint reader
hand geometry
system
iris recognition
system
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Terminals
• A terminal is a computer that allows users to send data to and/or receive information from a host computer
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Putting It All Together
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Putting It All Together
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Putting It All Together
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Input Devices for Physically Challenged Users
• Several input devices are available to assist physically challenged users:
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Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Gesture Recognitionbelow Chapter 5
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Input Devices for Physically Challenged Users
Keyboard with larger keys Head-mounted pointer
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Summary
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Living in a Digital World
Discovering Computers 2010
Chapter 5 Complete