Computer Literacy 2011-2012

1. សាកលវិទ្យាល័យភ្នំពេញអន្តរជាតិសាកលវិទ្យាល័យភ្នំពេញអន្តរជាតិ Phnom Penh International University Computer Literacy 2011-2012 Quality Excellence Innovation

2. Chapter 3Classification of Computer: Purpose Type and Capacity

3. Objectives • After this chapter, students would be able to: • Advantages and Disadvantages of Computers • Purpose of Computer Classification • Type of Computers • Capacity of Computers • Input Devices • Output Devices • Input and Output Devices (Multi Functions Devices)

4. Chapter 3Classification Advantages and Disadvantages of Using Computers Advantages of Using Computers Disadvantages of Using Computers

5. Advantages and Disadvantages of Using Computers • Green computinginvolves reducing the electricity consumed and environmental waste generated when using a computer • Strategies include: • Recycling • Regulating manufacturing processes • Extending the life of computers • Immediately donating or properly disposing of replaced computers

6. Chapter 3 Cont’… • A computer contains many electric, electronic, and mechanical components known as hardware

7. Categories of Computers

8. Personal Computers • A personal computercan perform all of its input, processing, output, and storage activities by itself • Two popular architectures are the PC and the Apple • Desktop computer

9. Mobile Computers and Mobile Devices

10. Mobile Computers and Mobile Devices

11. Mobile Computers and Mobile Devices

12. Game Consoles • A game consoleis a mobile computing device designed for single-player or multiplayer video games

13. Servers • A server controls access to the hardware, software, and other resources on a network • Provides a centralized storage area for programs, data, and information

14. Mainframes • A mainframe is a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously

15. Supercomputers • A supercomputer is the fastest, most powerful computer • Fastest supercomputers are capable of processing more than one quadrillion instructions in a single second

16. Embedded Computers • An embedded computeris a special-purpose computer that functions as a component in a larger product

17. Embedded Computers

18. Input Devices • Input is any data and instructions entered into the memory of a computer

19. What Is Input? • Instructions can be entered into the computer in the form of programs, commands, and user responses

20. What Are Input Devices

21. The Keyboard • A keyboard is an input device that contains keys users press to enter data and instructions into a computer

22. The Keyboard • Most desktop computer keyboards have…

23. The Keyboard • The insertion point, also known as the cursor, is a symbol on the screen that indicates where the next character you type will appear

24. The Keyboard

25. The Keyboard • An ergonomic keyboard has a design that reduces the chance of wrist and hand injuries • Ergonomics incorporates comfort, efficiency, and safety into the design of the workplace

26. The Keyboard • Keyboards on mobile devices typically are smaller and/or have fewer keys • Some phones have predictive text input, which saves time when entering text using the phone’s keypad

27. Pointing Devices

28. Mouse • A mouse is a pointing device that fits under the palm of your hand comfortably • Most widely used pointing device on desktop computers • A mouse can be wired or wireless

29. Mouse • Mouse operations

30. Other Pointing Devices

31. Touch Screens and Touch-Sensitive Pads • A touch screenis a touch-sensitive display device

32. Touch Screens and Touch-Sensitive Pads Microsoft Surface Touch-sensitive pads

33. Pen Input • With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections

34. Other Input for Smart Phones

35. Game Controllers • Video games and computer games use a game controlleras the input device that directs movements and actions of on-screen objects

36. Game Controllers

37. Digital Cameras • A digital camerais a mobile device that allows users to take pictures and store them digitally

38. Digital Cameras

39. Digital Cameras • Two factors affect the quality of digital camera photos:

40. Voice Input • Voice inputis the process of entering input by speaking into a microphone • Voice recognitionis the computer’s capability of distinguishing spoken words

41. Voice Input • Audio inputis the process of entering any sound into the computer

42. Voice Input • Music production software allows users to record, compose, mix, and edit music and sounds

43. Video Input • Video inputis the process of capturing full-motion images and storing them on a computer’s storage medium

44. Video Input

45. Video Input • A Web camis a type of digital video camera that enables a user to:

46. Video Input • A video conferenceis a meeting between two or more geographically separated people

47. Scanners and Reading Devices

48. Scanners and Reading Devices

49. Scanners and Reading Devices • Optical character recognition (OCR)involves reading characters from ordinary documents • A turnaround documentis a document you return to the company that creates and sends it

50. Scanners and Reading Devices • Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles • An OMR device scans the documents and matches the patterns of light