Input devices allow users to input data and commands into a computer. Common input devices include keyboards, mice, touchpads, microphones, and scanners. Output devices communicate the results of processed data to the outside world. Common output devices are monitors, printers, speakers, and projectors. Proper connection of input and output devices to a computer is required for use.

1. Requirement For EDP 111 Prepared by: Orville Troy Somcio

2. Computer System Hardware

3. Input Devices enable a user to input data and commands to the computer to be processed is any peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system (such as a computer).

4. Examples of Input Devices

5. Keyboard is the most widely used input device uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches. Keyboards are divided into sections

6. Sections of Keyboards Typewriter keys The standard alphabetic and numeric characters you would find on a typewriter Function keys Special keys that perform some specific function for the application being run

7. Sections of Keyboard Numeric keypad Used for mathematical operations Directional keys Used to move the cursor around the screen

8. Keyboard

9. The Mouse is a pointing device that rolls around on a flat surface and controls the location of the pointer on the screen is a pointing device that functions by detecting two-dimensional motion relative to its supporting surface

10. Mouse Functions Pointing Placing the on-screen pointer at a specific place Clicking Pressing and releasing the mouse button

11. Dragging Holding down the mouse button and dragging an object to a new location by dragging the mouse Double-clicking Pressing and releasing the mouse button twice very quickly Right-clicking Pressing the right mouse button

12. The Mouse

13. Other Pointing Devices

14. Trackball This is like a mouse turned upside down You roll a ball around with your fingers to control the location of the pointer frequently are found on notebook computers.

15. Trackball

16. Joystick and Wheel consist of a metal or plastic handle mounted on a base that you can move in any direction to move the pointer or other object typically are used for video games Most have buttons that can be pushed or clicked to control input/output

17. Joystick and wheel

18. Pointing Stick A pressure-sensitive device that resembles a pencil eraser found mostly on notebook computers has a replaceable rubber cap, traditionally red on the ThinkPad but also found in other colors on other machines

19. Pointing Stick

20. Graphics Tablet A flat drawing surface connected to the computer The user draws on the surface, and the figures or writing on the tablet can be input to the computer for processing These tablets may also be used to capture data or handwritten signatures

21. Graphics Tablet

22. Touch Display Screens that contain pictures or shapes that the user can press to input that data

23. Stylus/Digital Pen Used with mobile devices to input data

24. Touchpad Used mostly in laptop/notebook computers

25. Audio/Voice Input Inputting sound and/or voice These usually require a microphone and special voice recognition software to be installed on the computer Video Input Input from a camcorder or VCR using video capture cards

26. Scanners Devices that can convert a graphical image into a digital image and input it to the computer are types of source data entry machines to input automatically data (i.e. prices, code, etc.) in digital form from external sources like bar code to the computer

27. Types of Scanners

28. Image Scanners Used for scanning images and text

29. Bar Code Scanners Read product bar codes

30. Magnetic scanners Read magnetic strip on a credit card

31. Digital Cameras Used to take pictures and store them on a magnetic disk instead of on film Their images can be input directly into the computer a camera that takes video or still photographs, or both, digitally by recording images via an electronic image sensor

32. Digital Cameras

33. Biometric Input Uses fingerprint, face, handwriting, and voice for identification

34. Magnetic Storage Devices

35. Floppy Disks Small, portable disks that hold a limited amount of data

36. Hard Disks Large-capacity and fast-access storage devices

37. Zip Disks Auxiliary storage devices that can hold large quantities of data and can be portable

38. Magnetic Tape Drives Used for making system backups and storing large quantities of data

39. Solid-State Storage Media

40. Solid-State Storage Media Non-volatile removable media Miniature mobile media Uses integrated circuits USB flash drive Connects to the computer via a USB port

41. Caring for Storage Media To safeguard your data from damage, follow these tips when dealing with removable media: Keep away from magnetic fields. Avoid extreme temperatures. Never try to disassemble the case. Remove media from drive when not being used.

42. Tips for dealing with Storage Media Write-protect important data. Hold optical disks at their edges. Never remove the media from the drive if the access light is on. Keep disks in a sturdy case when transporting them.

43. Output Devices is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system (such as a computer) to the outside world.

44. Examples of Output Devices

45. Monitors are used to display video output to user a device that displays images or symbols generated by computers Maybe monochromatic or color Monochromatic monitors display output in a single-color display.

46. Factors that influence the quality of a monitor Screen size: The diagonal measurement in inches of the display area Resolution: The number of pixels that can be displayed in the display area Dot pitch: The distance between each pixel in the display area

47. Printers are used to create hard copy of a document or image It varies by speed, quality and price a computer peripheral that reproduces text and/or pictures on paper or other kind of printable surface

48. Types of Printers

49. Laser Printer Produce images using the same techniques as copier machines

50. Ink Jet Printer Uses fine nozzles to spray ink onto the page as the paper passes through

51. Dot matrix Work similarly to a typewriter in that ink is transferred to the paper by some part of the printer striking a ribbon to transfer an image

52. Other Types Of Output Devices

53. Speakers and Headsets

54. Fax machines and Fax Modems A device you can attach to a personal computer that enables you to transmit and receive electronic documents as faxes

55. Data Projectors A device that projects computer output onto a white or silver fabric screen that is wall, ceiling or tripod mounted. It is widely used in classrooms and auditoriums for instruction and slide presentations.

56. Connecting I/O devices to the computer Input and output devices must be connected to the computer before they can be used Plug the device into an existing socket or port on the back of the computer.

57. Connecting I/O devices to the computer Install an expansion card with the port you need included on the back of the card. Connect wirelessly.