chapter 5 input and output
Post on 22-Jan-2016
73 Views
Preview:
DESCRIPTION
TRANSCRIPT
Chapter 5Input and Output
Today
We will be discussing :• 23 different types of input devices• 10 output devices • 5 combined devices
How many can you name?
What Is Input?
What is input?
p. 166 Fig. 5-1 Next
Input device is any hardware component used to enter data or instructions into a computer
Data or instructions entered into the memory of computer
Keyboard and Pointing Devices
1) What is a keyboard?
p. 168 Fig. 5-2 Next
Input device that contains keys users press to enter data into a computer
Includes typing area, numeric keypad, and function keys
Can be cordless or built-in
Keyboard and Pointing Devices
What is a mouse?
p. 169 Fig. 5-3a Next
Pointing device that fits under the palm of your hand Pointing device controls
movement of pointer, also called the pointer
2) Mechanical mouse has rubber or metal ball on its underside
mouse buttonswheel button
mouse pad
ball
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Mousebelow Chapter 5
Keyboard and Pointing Devices
3) What is an optical mouse?
p. 169 Fig. 5-3b Next
No moving mechanical parts inside
Senses light to detect mouse’s movement
More precise than mechanical mouse
More expensive than a mechanical mouse
Keyboard and Pointing Devices
4) What is a trackball?
p. 170 Fig. 5-4 Next
Stationary pointing device with a ball on its top or side
To move pointer, rotate ball with thumb, fingers, or palm of hand
Keyboard and Pointing Devices
What are a touchpad and a pointing stick?
p. 170 Figs. 5-5—5-6 Next
5) Touchpad is small, flat, rectangular pointing device sensitive to pressure and motion
6) Pointing stick is pointing device shaped like pencil eraser positioned between keys on keyboard
Keyboard and Pointing Devices
What are a joystick and a wheel?
p. 171 Fig. 5-7 Next
7) Joystick is vertical lever mounted on a base 8) Wheel is steering-wheel-type input device
Pedal simulates car brakes and accelerator
Keyboard and Pointing Devices
9) What is a light pen?
p. 171 Fig. 5-8 Next
Handheld input device that can detect the presence of light Press light pen against
screen surface and then press button on pen
Keyboard and Pointing Devices
10) What is a touch screen?
p. 171 Fig. 5-9 Next
Touch areas of screen with finger
Often used with kiosks
Keyboard and Pointing Devices
11) What is a stylus and a digital pen?
p. 172 Fig. 5-10 Next
Looks like a ballpoint pen, but uses pressure to write text and draw lines
Used with graphics tablets, flat electronic boards
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Pen Inputbelow Chapter 5
Other Input Devices
What is voice input? 12) Entering data by speaking into a microphone Voice recognition or speech recognition is the
computer’s capability to distinguish spoken words
p. 173 Next
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Voice Inputbelow Chapter 5
Other Input Devices
p. 173 Fig. 5-13 Next
What is audio input? 13) Entering sounds into a computer - speech,
music, and sound effects using the electronic keyboard
MIDI - standard defining how digital musicaldevices represent sound electronically
Other Input Devices
14) What is a digital camera?
p. 175 Fig. 5-16 Next
Allows you to take digital pictures
Images viewable immediately on camera Download to
computer Post pictures
to Web
Other Input Devices
15, 16)What are a PC video camera and a Web cam?
p. 176 Fig. 5-17 Next
PC video camerac—cDV camera used to capture video and still images, and to make video telephone calls on Internet Also called PC camera
Web camc—cvideo camera that displays its output on a Web page
Other Input Devices
What is video conferencing?
p. 176 Fig. 5-18 Next
Two or more geographically separated people who use network on Internet to transmit audio and video data
Other Input Devices
17) What is a scanner?
p. 177 Fig. 5-19 Next
Light-sensing device that reads printed text and graphics Used for image processing, converting paper
documents into electronic images
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Scannersbelow Chapter 5
Other Input Devices
What is an optical reader?
p. 177 Fig. 5-21 Next
18) Optical character recognition (OCR) reads characters in OCR font
19) Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles
20) Bar code reader
Device that uses light source to read characters, marks, and codes and then converts them into digital data
Other Input Devices
What is a turnaround document?
p. 177 Fig. 5-20 Next
Document that you return to the company that sent it Portion you return has
information printed in OCR characters
Other Input Devices
21) What is a magnetic stripe card reader?
p. 179 Fig. 5-23 Next
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
22) What is a magnetic-ink character recognition (MICR) reader?
Other Input Devices
p. 179 Fig. 5-24 Next
Can read text printed with magnetized ink Banking industry almost exclusively uses MICR
for check processing
Other Input Devices
What is biometrics?
p. 181 Fig. 5-27 Next
Authenticates person’s identity by verifying a personal characteristic 23) Fingerprint scanner captures
curves and indentations of fingerprint
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Biometric Input below Chapter 5
Other Input Devices
What are examples of biometric technology?
p. 181 Fig. 5-28 Next
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
New input devices called “Internet wearables” or “smart clothing.”It is predicted that in 10 years, people will be able to wear Internet devices.
1. Small input devices Hewlett-Packard is developing that use Internet technology to monitor blood sugar and cholesterol.
2. Researchers at MIT have introduced an input device that looks like a brooch and, in conjunction with the Internet, someday will be able to monitor heart rate and body temperature.
3. Uniforms with sewn-in sensors that report the location and condition of wounded soldiers.
4. Hearing aids that let business people tap into and receive information from company intranets.
5. Glasses that allow wearers to access and view pages on the World Wide Web.
How do you feel about this technology?
What is Output?
What is output?
p. 182 Fig. 5-29 Next
Data that has been processed into a useful form,called information Output device is any hardware component that can convey
information to one or more people
Today
Name the output devices you have used.
Display Devices
1) What is an LCD monitor?
p. 184 Fig. 5-30 Next
Uses liquid crystal display Have a small footprint Mobile devices that contain
LCD displays include Notebook computer,
Tablet PC, PDA, and Smart Phone
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click LCD Technology below Chapter 5
Display Devices
2) What is a plasma monitor?
p. 185 Fig. 5-32 Next
Displays image by applying voltage to layer of gas Larger screen size and higher display quality than LCD, but
are more expensive
Display Devices
3) What is a CRT monitor?
p. 186 Fig. 5-33 Next
Contains cathode-ray tube (CRT)
Common sizes are 15, 17, 19, 21, and 22 inches Viewable size is diagonal
measurement of actual viewing area
Printers
What is a nonimpact printer?
p. 189 Fig. 5-36 Next
Forms characters and graphics without striking paper 4) Ink-jet printer sprays tiny drops of liquid ink
onto paper Prints in black-and-white or color on a variety
of paper types
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Ink-Jet Printersbelow Chapter 5
Printers
5) What is a photo printer?
p. 190 Fig. 5-37 Next
Color printer that produces photo-lab-quality pictures Many photo printers have a built-in card slot
Printers
6) What is a laser printer?
p. 190 Fig. 5-38 Next
High-speed, high-quality nonimpact printer
Prints text and graphics in very high-quality resolution, ranging from 1,200 to 2,400 dpi
Typically costs more than ink-jet printer, but is much faster
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Laser Printersbelow Chapter 5
Printers
7) What is a plotter?
p. 192 Fig. 5-41 Next
Sophisticated printer used to produce high-quality drawings
Large-format printer creates photo-realistic-qualitycolor prints
Other Output Devices
What is an audio output device?
p. 193 Fig. 5-43 Next
Computer component that produces music, speech, or other sounds
8,9) Speakers and headsets are common devices
Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Speakers and Headsets below Chapter 5
Other Output Devices
10) What is a data projector?
p. 195 Fig. 5-46 Next
Device that takes image from computer screen and projects it onto larger screen
Combined Input and output devices How many can you name?
Combined Input and Output Devices1) What is a smart phone?
p. 175 Next
Users can input and send text messages, graphics, pictures, video clips, and sound files
Combined Input and Output Devices2) What is a facsimile (fax) machine?
p. 194 Fig. 5-44 Next
Device that transmits and receives documents over telephone lines
What is a fax modem? Modem that allows you to send and receive electronic
documents as faxes
Combined Input and Output Devices3) What is a multifunction peripheral?
p. 194 Fig. 5-45 Next
Provides functionality of printer, scanner, copy machine, and fax machine
Combined Input and Output Devices4) What is a point of sale (POS) terminal?
p. 180 Fig. 5-25 Next
Records purchases, processes credit or debit cards, and updates inventory
Combined Input and Output Devices5) What is an automated teller machine (ATM)?
p. 180 Fig. 5-26 Next
Self-service banking machine that connects to a host computer through a network
The Bureau of Labor Statistics reports that work-related musculoskeletal disorders (MSDs) account for one-third of all occupational injuries and illnesses. These disorders are the largest job-related injury and illness problem in the United States today.
Whose responsibility is safe computer usage — the employee or the employer?
Analysts predict electronic books will revolutionize the publishing industry. An electronic book primarily is a digital storage and display unit. They range in size and weight from a paperback to a two-pound textbook and can hold thousands of pages or the equivalent of ten or more books. You can move forward or backward one page at a time, or use a stylus to write notes in the margin.
What is your opinion of the electronic book? Will it replace the printed book? Why not just buy the book? Does society have a place for the electronic book? Who do you think will use electronic books and how will they use
them?
Analysts predict electronic books will revolutionize the publishing industry. An electronic book primarily is a digital storage and display unit. Some plug into a cradle that attaches to your computer, letting you download textbooks or novels from Web-based publishers. Others include a built-in modem that allows you to connect directly to the Internet. They range in size and weight from a paperback to a two-pound textbook and can hold thousands of pages or the equivalent of ten or more books. Keeping with some traits of traditional books, you can move forward or backward one page at a time, or use a stylus to write notes in the margin. What is your opinion of the electronic book? Will it replace the printed book? Why not just buy the book? Does society have a place for the electronic book? Who do you think will use electronic books and how will they use them?
Although input varies, in one way input devices do not: most are encased in a bland, beige, plastic shell. A California company is changing that by offering keyboards and mice in oak, cherry, or maple. Upgrading appearance is not cheap. A wooden keyboard costs more than $600, a wooden mouse more than $300. Some people insist these devices make for a more attractive and, in the long run, more productive work setting.
How much money would you spend to upgrade the appearance of your computer equipment? Why?
Would this kind of upgrade increase productivity? Why or why not?
top related