Chapter 5 Input and Output

1. Chapter 5Input and Output

2. Today We will be discussing : • 23 different types of input devices • 10 output devices • 5 combined devices How many can you name?

3. What Is Input? Next What isinput? • Data or instructions entered into the memory of computer • Input device is any hardware component used to enter data or instructions into a computer p. 166 Fig. 5-1

4. Keyboard and Pointing Devices Next 1) What is a keyboard? • 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 p. 168 Fig. 5-2

5. Keyboard and Pointing Devices mouse buttons wheel button ball Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Mousebelow Chapter 5 mouse pad Next What is amouse? • Pointing device that fits under the palm of your hand • Pointing device controls movement of pointer, also called the pointer • 2) Mechanical mousehas rubber or metal ball on its underside p. 169 Fig. 5-3a

6. Keyboard and Pointing Devices Next 3) What is anoptical mouse? • No moving mechanical parts inside • Senses light to detect mouse’s movement • More precise than mechanical mouse • More expensive than a mechanical mouse p. 169 Fig. 5-3b

7. Keyboard and Pointing Devices Next 4) What is atrackball? • Stationary pointing device with a ball on its top or side • To move pointer, rotate ball with thumb, fingers, or palm of hand p. 170 Fig. 5-4

8. Keyboard and Pointing Devices Next What are atouchpadand apointing stick? • 5) Touchpadis small, flat, rectangular pointing device sensitive to pressure and motion • 6) Pointing stickis pointing device shaped like pencil eraser positioned between keys on keyboard p. 170 Figs. 5-5—5-6

9. Keyboard and Pointing Devices Next What are ajoystickand awheel? • 7) Joystickis vertical lever mounted on a base • 8) Wheelis steering-wheel-type input device • Pedal simulates car brakes and accelerator p. 171 Fig. 5-7

10. Keyboard and Pointing Devices Next 9) What is alight pen? • Handheld input device that can detect the presence of light • Press light pen against screen surface and then press button on pen p. 171 Fig. 5-8

11. Keyboard and Pointing Devices Next 10) What is atouch screen? • Touch areas of screen with finger • Often used with kiosks p. 171 Fig. 5-9

12. Keyboard and Pointing Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Pen Inputbelow Chapter 5 Next 11) What is astylus and a digital pen? • Looks like a ballpoint pen, but uses pressure to write text and draw lines • Used withgraphics tablets, flat electronic boards p. 172 Fig. 5-10

13. Other Input Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Voice Inputbelow Chapter 5 Next What is voice input? • 12) Entering data by speaking into a microphone • Voice recognition or speech recognition is thecomputer’s capability to distinguish spoken words p. 173

14. Other Input Devices 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 p. 173 Fig. 5-13

15. Other Input Devices Next 14) What is adigital camera? • Allows you to take digital pictures • Images viewable immediately on camera • Download to computer • Post pictures to Web p. 175 Fig. 5-16

16. Other Input Devices Next 15, 16)What are aPC video cameraand aWeb cam? • 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 p. 176 Fig. 5-17

17. Other Input Devices Next What isvideo conferencing? • Two or more geographically separated people who use network on Internet to transmit audio and video data p. 176 Fig. 5-18

18. Other Input Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Scannersbelow Chapter 5 Next 17) What is ascanner? • Light-sensing device that reads printed text and graphics • Used for image processing, converting paper documents into electronic images p. 177 Fig. 5-19

19. Other Input Devices Next What is anoptical reader? • Device that uses light source to read characters, marks, and codes and then converts them into digital data • 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 p. 177 Fig. 5-21

20. Other Input Devices Next What is aturnaround document? • Document that you return to the company that sent it • Portion you return has information printed in OCR characters p. 177 Fig. 5-20

21. Other Input Devices Next 21) What is amagnetic stripe card reader? • 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 p. 179 Fig. 5-23

22. Other Input Devices Next 22) What is amagnetic-ink character recognition(MICR) reader? • Can read text printed with magnetized ink • Banking industry almost exclusively uses MICR for check processing p. 179 Fig. 5-24

23. Other Input Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Biometric Input below Chapter 5 Next What isbiometrics? • Authenticates person’s identity by verifying a personal characteristic • 23) Fingerprint scanner captures curves and indentations of fingerprint p. 181 Fig. 5-27

24. Other Input Devices Next What are examples of biometric technology? • Voice verification system compares live speech with stored voice pattern • Signature verification system recognizes shape of signature • Iris recognition systemreads 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 p. 181 Fig. 5-28

25. New input devices called “Internet wearables” or “smart clothing.” It is predicted that in 10 years, people will be able to wear Internet devices. • Small input devices Hewlett-Packard is developing that use Internet technology to monitor blood sugar and cholesterol. • 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. • Uniforms with sewn-in sensors that report the location and condition of wounded soldiers. • Hearing aids that let business people tap into and receive information from company intranets. • Glasses that allow wearers to access and view pages on the World Wide Web. How do you feel about this technology?

26. What is Output? Next What isoutput? • 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 p. 182 Fig. 5-29

27. Today Name the output devices you have used.

28. Display Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click LCD Technology below Chapter 5 Next 1) What is an LCD monitor? • Uses liquid crystal display • Have a small footprint • Mobile devices that contain LCD displays include • Notebook computer, Tablet PC, PDA, and Smart Phone p. 184 Fig. 5-30

29. Display Devices Next 2) What is aplasma monitor? • Displays image by applying voltage to layer of gas • Larger screen size and higher display quality than LCD, but are more expensive p. 185 Fig. 5-32

30. Display Devices Next 3) What is aCRT monitor? • Containscathode-ray tube (CRT) • Common sizes are 15, 17, 19, 21, and 22 inches • Viewable size is diagonal measurement of actual viewing area p. 186 Fig. 5-33

31. Printers Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Ink-Jet Printersbelow Chapter 5 Next What is anonimpact printer? • Forms characters and graphics without striking paper • 4) Ink-jet printersprays tiny drops of liquid ink onto paper • Prints in black-and-white or color on a variety of paper types p. 189 Fig. 5-36

32. Printers Next 5) What is aphoto printer? • Color printer that produces photo-lab-quality pictures • Many photo printers have a built-in card slot p. 190 Fig. 5-37

33. Printers Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Laser Printersbelow Chapter 5 Next 6) What is alaser printer? • 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 p. 190 Fig. 5-38

34. Printers Next 7) What is aplotter? • Sophisticated printer used to produce high-quality drawings • Large-format printercreates photo-realistic-qualitycolor prints p. 192 Fig. 5-41

35. Other Output Devices Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Speakers and Headsets below Chapter 5 Next What is anaudio output device? • Computer component that produces music, speech, or other sounds • 8,9) Speakers and headsets are common devices p. 193 Fig. 5-43

36. Other Output Devices Next 10) What is adata projector? • Device that takes image from computer screen and projects it onto larger screen p. 195 Fig. 5-46

37. Combined Input and output devices • How many can you name?

38. Combined Input and Output Devices Next 1) What is asmart phone? • Users can input and send text messages, graphics, pictures, video clips, and sound files p. 175

39. Combined Input and Output Devices Next 2) What is afacsimile(fax) machine? • Device that transmits and receives documents over telephone lines What is afax modem? • Modem that allows you to send and receive electronic documents as faxes p. 194 Fig. 5-44

40. Combined Input and Output Devices Next 3) What is amultifunction peripheral? • Provides functionality of printer, scanner, copy machine, and fax machine p. 194 Fig. 5-45

41. Combined Input and Output Devices Next 4) What is apoint of sale (POS) terminal? • Records purchases, processes credit or debit cards, and updates inventory p. 180 Fig. 5-25

42. Combined Input and Output Devices Next 5) What is anautomated teller machine (ATM)? • Self-service banking machine that connects to a host computer through a network p. 180 Fig. 5-26

43. 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?

44. 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? 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?

45. 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?