Chapter 7
Input and Output
College of Computer and Information Science
Key Words & Terms
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active matrix monitor:主动矩阵监视器
bar code:条形码
bar code reader: 条形码读码器
bar code scanner:条形码扫描仪
cathode ray tube monitor (CRT):阴极射线管监视器
clarity:清晰度
combination key:组合键
cordless mouse:无线鼠标
data projector:数字投影仪
digital camera:数字相机
digital media player: 数字媒体播放器
digital music player: 数字音乐播放器
digital video camera:数字摄像机
display screen: 显示屏
dot-matrix printer:点阵式打印机
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Key Words & Terms
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dot pitch:点距
dots-per-inch (dpi):每英寸点数
dual-scan monitor:整体扫描显示器
dumb terminal:哑终端
e-book:电子图书
ergonomic keyboard: 保健键盘
fax (facsimile) machine:传真机
flat-panel monitor:平板显示器
flatbed scanner:平板式扫描仪
flexible keyboard: 便携式键盘
handwriting recognition software: 手写识别软件
Headphones:耳机
high-definition television (HDTV):高清电视
ink-jet printer:喷墨式打印机
intelligent terminal:智能终端
Internet telephone:网络电话
Internet telephony:网络电话传输
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Key Words & Terms
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IP Telephony:网络电话传输
joystick:游戏杆
keyboard:键盘
laser printer:激光打印机
light pen:光笔
liquid crystal display (LCD):液晶显示器
magnetic card reader: 磁卡读卡机
Magnetic-ink character recognition (MICR):磁墨符号
识别
mechanical mouse:机械鼠标
monitor:监视器
mouse:鼠标
mouse pointer:鼠标指针
multifunction device (MFD):多功能设备
network terminal:网络终端
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Key Words & Terms
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multifunction device (MFD):多功能设备
network terminal:网络终端
numeric keypad:数字键区
optical character recognition (OCR):光学符号识别
optical-mark recognition (OMR):光学标记识别
optical mouse:光电鼠标
optical scanner:光学扫描仪
passive-matrix monitor:被动矩阵监视器
PDA keyboard: PDA键盘
personal laser printer:个人激光打印机
photo printer:照片打印机
pixel (picture element):象素
pixel pitch: 象素点距
platform scanner:平板扫描仪
plotter:绘图仪
pointing stick: 点击杆
portable printer: 便携式打印机
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Key Words & Terms
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portable scanner: 便携式扫描仪
printer:打印机
radio frequency card reader: 无线电频卡读卡机
radio frequency identification (RFID)：无线电频识别
refresh rate:刷新率
resolution:分辨率
roller ball:滚动球
shared laser printer: 共享式激光打印机
speakers:扬声器
stylus: 尖笔（用于输入）
technical writer: 技术文档制作者
telephony:电话学，电话传输
terminal:终端
thermal printer:热感式打印机
thin client:网络终端
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Key Words & Terms
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thin film transistor monitor (TFT):主动矩阵显示器
toggle key:触发键
touch pad:触摸板
touch screen:触摸屏
trackball:轨迹球
traditional keyboard: 传统键盘
Universal Product Code (UPC):通用产品代码
voice-over IP (VoIP):网络电话传输
voice recognition system:语音识别系统
wand reader:条形码识别器
WebCam:网络摄像机
wheel button: （鼠标）滚轮
wireless mouse:无线鼠标
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Competencies (Page 1 of 2)
• Define input
• Describe keyboard entry, pointing devices, and
scanning devices
• Discuss image capturing devices, including digital
cameras, digital video cameras, and audio input
devices
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Competencies
(Page 2 of 2)
• Define output
• Describe monitors, printers, and audio output
devices
• Discuss combination input and output devices,
including fax machines, multifunctional devices,
Internet telephones, and terminals
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Introduction
Do you ever wonder how information
gets into your computer and comes out
in a form you can use? Input devices
convert what we understand into what
the system unit can process. Output
devices convert what the system unit
has processed into a form that we can
understand. Input and output devices
are the focus of this chapter.
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What is Input?
• Any data or instructions used by a computer
• Input devices
– Hardware
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Keyboards
Pointing devices
Scanning devices
Other devices
– Translates data into a form that the system unit
can process
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Keyboard Entry (Page 1 of 2)
• Keyboards
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Traditional keyboards
Flexible keyboards
Ergonomic keyboards
Wireless keyboards
PDA keyboards
• Features
– Typewriter keyboard with numeric keypad
– Special purpose keys
• Toggle and combination keys
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Keyboard Entry (Page 2 of 2)
Traditional Keyboard
Return
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Pointing Devices (Page 1 of 2)
• Mice
– Mechanical
– Optical
– Cordless
or wireless
• Three similar devices to mice
– Trackball
– Touch pads
– Pointing stick
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Pointing Devices (Page 2 of 2)
• Joystick
• Touch Screen
• Light Pen
• Stylus
Return
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Scanning Devices (Page 1 of 2)
• Optical scanners
– Flatbed scanners
– Portable scanners
• Card Readers
– Magnetic card readers
– Radio Frequency card readers
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Scanning Devices (Page 2 of 2)
• Bar code readers
– Handheld wand readers or platform scanners
– Contain photoelectric cells that read bar codes
• Character and mark recognition devices
– Magnetic ink character recognition (MICR)
– Optical-character recognition (OCR)
– Optical-mark recognition (OMR)
Return
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Image Capturing Devices
• Digital cameras
– Images recorded digitally on a disk
– Images can be downloaded to a computer
• Digital video cameras
– Records motion digitally
– Can take still images as well
– WebCams
• Specialized digital video cameras
• Broadcast images over the Internet
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Webcams And Instant Messaging
• Exchange messages
and files with friends
• Voice and video
capabilities
• Application sharing
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Audio-Input Devices
• Voice recognition
systems
– Use a microphone, a
sound card, and
special software
– Users can operate
computers and create
documents using
voice commands
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What is Output?
• Processed data or information
• Types of output
– Text
– Graphics/Photos
– Audio & video
• Output devices
– Monitors
– Printers
– Other Devices
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Monitors (Page 1 of 2)
• Known as screens or display screens
• Output referred to as soft copy
• Features
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Resolution/pixels
Dot pitch
Refresh rate
Size
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Monitors (Page 2 of 2)
• Cathode-ray tube (CRT) monitors
• Flat-panel monitors
– Require less power to operate
– Portable and thinner than CRTs
• Other monitors
– E-books
– Data projectors
– High-definition television (HDTV)
Return
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Printers (Page 1 of 2)
• Translates information that has been
processed by the system unit
• Output referred to as hard copy
• Features
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Resolution
Color capability
Speed
Memory
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Printers (Page 2 of 2)
• Ink-jet printer
• Laser printer
– Personal laser printers
– Shared laser printers
• Thermal printer
• Other printers
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Dot-matrix printers
Plotters
Photo printers
Portable printers
Return
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Audio-Output Devices
• Translates audio information from the
computer into sounds that people can
understand
• Common devices
– Speakers
– Headphones
• Digital Music Players
– iPod
– iRiver
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Multifunctional Devices (MFD)
• Many devices combine input and output
capabilities and offer cost and space
advantages
• Fax machines
• Internet telephones
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known as Internet telephony
IP telephony
and Voice-over IP (VoIP)
Three approaches
• Terminals
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Internet Telephone Approaches
• Computer-to computer
– Free long distance calls
– Requires computers to be connected to the Internet
– MSN is most widely used software
• Computer-to traditional telephone
– Place the call from a computer to a phone
– Requires an Internet phone service provider
• Software requirements
• Small monthly and/or per-minute fee
• Traditional telephone-to-traditional telephone
– Does not require a computer
– Subscription required to a special Internet phone service provider
• Special hardware adapter
• Cost is similar to the computer-to-traditional telephone approach
Return
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Terminals
• An input and output device
• Connects to a mainframe or server
• Types of terminals
– Dumb terminal
– Intelligent terminal
– Network terminal
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Discussion Questions (Page 1 of 2)
• Define input and input devices.
• Describe the different types of pointing,
scanning, image capturing, and audio-input
devices.
• Describe the three categories of output
devices.
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Discussion Questions (Page 2 of 2)
• Define output and output devices.
• What are combination input and output
devices? Describe four such devices.
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End of Chapter 7
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