This document discusses various input and output devices used in computing. It describes keyboards and their different types. Mice, trackballs, touchpads and joysticks are described as pointing devices. Scanners, barcode readers, and optical character and mark recognition devices are covered as input devices. For output, monitors, printers, speakers and other audio devices are summarized. Projectors, TVs and multifunction devices are also mentioned.

2. CHAPTER 3
INPUT&OUTPUT

4. Translate What People Understand into
A from That Computers Can process.
INPUT DEVICE

5. KEYBOARD

6. MOUSE

7. SCANNER

8. JOYSTICK

9. knows as Qwerty basic input device
KEYBOARD
1.Traditional: full sized, rigid rectangular keyboards.
2.Flexible: ford or roll up for easy packing or storage.
3.Ergonomic: rectangular and a palm rest is provided.
4.Wireless: transmit input to the system unit though air.
5.PDA: used to send e-mail create document more.

10. Keyboard Key Information
keys Function Example
Toggle Turn feature on or off Caps Lock, Num Lock, Scroll Lock,
Combination Work only when help with another key. CTRL, ALT.
Navigation Control cursor/insertion point Arrow keys
Function Shortcut for specific keys. F1 to f12
Numeric Numbers and arithmetic symbol 0 to 9
Typewriter Alphabets numbers A to z, 0to 9
KEYBOARD

12. Pointer, Locator, Arrow.
MOUSE
1.Mechanical mouse – it has ball on the bottom. Roller rotates
and Control the pointer
2.Optical mouse – no moving parts, it emits and senses light to
detect mouse moment
3.Cordless or wireless mouse – battery powered device. User
radio Waves or informed light waver to communicate.

13.  Three devices similar to a mouse are trackballs
touch surface and Pointing sticks
Touch surface
Notebook
Moving and tapping finger on surface
Pointing stick Located in the middle of the keyboard Notebook
Joystick Use of button and triggers Notebook
Touch Screen
Monitor with a clear plastic outer layer, behind this layer
are crisscrossed invisible beams of infrared light
ATMs, restaurants,
Information center
Light Pen
Light sensitive pen like device closes photoelectronic
circuit to enter data.
Edit digital images
Stylus Pen Like Device P.D.A.
Graphical Tablets Use special graphics surface or Table. Mapmakers Artist, Engineers,
Touch Surface Moving and tapping finger on surface
Pointing Stick Located in the middle of the Keyboard Notebook
Joystick Use to button and triggers Computer Gaming Device

14. Scanning Devices
1. Flatbed Scanner: Like a copy machine. e.g. advertising professionals
2. Portable Scanner: Handheld device that slide across the image. Student Lawyers.

15. UPC : Universal Product Code.
The Universal Product Code is a standard for
encoding a set of lines and spaces that can
be scanned and interpreted into numbers to
identify a product .

17. Read bar codes or the vertical zebra-striped
marks printed on product.
BAR CODE READERS

18. Character and Marks Recognition devices

19. Used by bank to read unusual numbers on the bottom of
cheeks and deposit slip.
MICR-Magnetic Ink Character Recognition

20. OCR-Optical Character Reader
 Process of reading and converting typed
 Printed or handwritten characters into machine-encoded
text or something that the computer can manipulate
 It is a subset of image recognition and is widely used as a
form of data entry with the input being some sort of
printed document or data record such as bank
statements,

21. OMR-Optical Mark Recognition
Marks sensing, Sense presence or absence of mark,
such as a pencil mark, used to score multiple choice
tests.

22. Image Capturing Devices

24. use a microphone, a sound card, and
special software.
Voice Recognition System

25. Allow musical instrument to connect to the
system.
MIDI-Musical Instrument Digital Interface

27. Translate processed information into a
form human can understand.
OUTPUT DEVICE

28. Video display unit / display screen or screen output of
monitor called softcopy.
MONITOR

29. PRINTER

30. SPEAKER

31. HEADPHONE

32. THREE TYPES OF MONITOR

33. CATHODE RAY TUBE
Like TV used in house and office.
CRT

34. LCD
Liquid Crystal Display
LCD technology to show clear images, and is found
mostly in laptop computers and flat panel monitors.

35. LED
Light-Emitting Diode

36. E-book reader
User to read down loader magazines,
papers and entire books

37. DATA PROJECTORS
 Use for presentations from classroom to boardroom.

38. HDTV- High Definition Television
PC/TV merger of microcomputer and television
It delivers much cleared and wide – screen picture then regular TV.

39. PRINTERS

40. Printer output is called hard copy

41. Print 15 to 17 Pages Per Minute.
Personal Laser Printer

42. Connecting a laser printer to your office network makes
the printer available to employees or colleagues who use
the same network, allowing them to print documents.
Shared Laser Printer

43. Create Maps, architectural and engineering
drawings, Plotters used by graphic artist,
engineers and architecture.
PLOTTERS

44. Print Photo quality images from digital cameras.
PHOTO PRINTER

45. Small, Portable Printer use with notebook computers,

46. Audio Output Devices
Speaker and Head Phones

47. Facsimile transmission machine, for sending and
receiving image through telephone lines.
Fax Machine

48. Know as all in one. Combine the over IP(VoIP)-use the internet
rather than traditional communication line to support voice
communication. To call telephony requires a high-speed internet
connection and special software and Hardware.
Multifunction Devices(MFD)

49. A. Computer to Computer.
Three Approaches are
B. Computer to Traditional telephone.
C. Traditional Telephone to traditional telephone.

50. Is an Input and Output device that connects to
host computer or Server.
TERMINAL

51. Cannot process data independently.
eg. Airline reservation
DUMB TERMINAL

52. Net PC or Net Personal Computer, have only one
internal hard disk and so no expansion slots.
INTELLIGENT TERMINAL

53. Also know as thin client or Network computer.
Do not have hard disk and must rely on a host
computer or server for application and system software.
NETWORK TERMINAL

54. Also known as web Terminal or Web appliance,
Provide access to the internet and display web
pages on standard television.
INTERNET TERMINAL