Lecture 1 hajanahakamanabahakabzhzzm.pptx

Hbknvb

1. Introduction to ICT Lecture 1

2. ICT The technology used to handle information and aid communication

3. ICT ICT is the technology required for information processing, in particular the use of electronic computers, communication devices and software applications to covert, store, protect, process, transmit and retrieve information from everywhere, anytime.

4. ICT Information refers to the knowledge obtained from reading, investigation, study or research. The tools to transmit information are the telephone, television and radio. Communication is an act of transmitting messages. Technology is the use of scientific knowledge, experience and resources to create processes and products that fulfill human needs. Technology is vital in communication.

5. Globalization of Economy Information Tech Innovations Knowledge-based Economy Society Escalating Demand for Education Effective Learning For All Anytime Anywhere Necessity of ICT

6. What Is a Computer? A computer is an electronic device, operating under the control of instructions stored in its own memory 6 Page 6 Information Processing Cycle

7. Data vs Information Discovering Computers 2012: Chapter 1 7 Page 6 Figure 1-2

8. A World of Computers Computers are everywhere 8

9. Categories of Computers Discovering Computers 2012: Chapter 1 9 Page 19

10. Personal Computers A personal computer can perform all of its input, processing, output, and storage activities by itself Two popular architectures are the PC and the Apple Desktop computer Discovering Computers 2012: Chapter 1 10 Pages 19 - 20 Figures 1-15 - 1-16

11. Mobile Computers and Mobile Devices Discovering Computers 2012: Chapter 1 11 Pages 20 - 22 Figures 1-17 – 1-20

12. Mobile Computers and Mobile Devices Discovering Computers 2012: Chapter 1 12 Pages 22 - 23 Figures 1-21 – 1-23

13. Game Consoles A game console is a mobile computing device designed for single-player or multiplayer video games Discovering Computers 2012: Chapter 1 13 Page 24 Figure 1-24

14. 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 Discovering Computers 2012: Chapter 1 14 Page 25 Figure 1-25

15. Mainframes A mainframe is a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously Discovering Computers 2012: Chapter 1 15 Page 25 Figure 1-26

16. Supercomputers A supercomputer is the fastest, most powerful computer Fastest supercomputers are capable of processing more than one quadrillion instructions in a single second Discovering Computers 2012: Chapter 1 16 Page 25 Figure 1-27

17. Embedded Computers An embedded computer is a special-purpose computer that functions as a component in a larger product Discovering Computers 2012: Chapter 1 17 Page 26

18. Discovering Computers 2012: Chapter 1 18 Page 26 Figure 1-28

19. The Components of a Computer A computer contains many electric, electronic, and mechanical components known as hardware 19

20. Components of Computer

21. Input Devices A keyboard contains keys you press to enter data and instructions into a computer or mobile device

22. Input Devices A pointing device is an input device that allows a user to control a small symbol on a screen, called the pointer. Desktops typically use a mouse as their pointing device, and laptops use a touchpad.

23. Input Devices

24. Input Devices A microphone is an input device that enables you to speak into a computer or mobile device. You also can talk into a headset , which contains both a microphone and a speaker. A webcam is a digital video (DV) camera that allows you to capture video and usually audio input for your computer or mobile device

25. Input Devices A scanner is a light-sensing input device that converts printed text and images into a form the computer can process. A popular type of scanner works in a manner similar to a copy machine, except that instead of creating a paper copy of the document or photo, it stores the scanned document or photo electronically.

26. Output Devices A printer is an output device that produces text and graphics on a physical medium, such as paper or other material. Printed content sometimes is referred to as a hard copy or printout.

27. Output Devices A 3-D printer can print solid objects, such as clothing, prosthetics, eyewear, implants, toys, parts, prototypes, and more. 3-D printers use a plastic substance that prints in layers to create a 3-D (three-dimensional) model.

28. Output Devices A display is an output device that visually conveys text, graphics, and video information. Displays consist of a screen and the components that produce the information on the screen. Monitor, mobile displays A  Smart TV is an Internet-enabled high-definition television

29. Output Devices Speakers allow you to hear audio, that is, music, voice, and other sounds . Both earbuds and headphones usually include noise-cancelling technology to reduce the interference of sounds from the surrounding environment

30. System Unit The system unit is a case that contains electronic components of the computer that are used to process data. The circuitry of the system unit usually is part of or is connected to a circuit board called the motherboard . Two main components on the motherboard are the processor and memory . Processor , or central processing unit ( CPU ), is the electronic component that interprets and carries out the basic instructions that operate the computer.

31. Memory and Storage Memory consists of electronic components that store instructions waiting to be executed and the data needed by those instructions. Most memory keeps data and instructions temporarily , which means its contents are erased when the computer is shut off.

32. Memory and Storage A computer keeps data, instructions, and information on storage media. H ard disks, solid-state drives, USB (universal serial bus) flash drives, memory cards, and ­optical discs. A storage device records (writes) and/or retrieves (reads) items to and from storage media

33. Memory and Storage A hard disk is a storage device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information. The entire device is enclosed in an airtight, sealed case to protect it from contamination. Laptops and desktops often contain at least one hard disk that is mounted inside the computer’s

34. Memory and Storage

35. Memory and Storage A solid-state drive (SSD) is a storage device that typically uses flash memory to store data, instructions, and information. Flash memory contains no moving parts, making it more durable and shock resistant than other types of media

36. Memory and Storage A USB flash drive is a portable flash memory storage device that you plug in a USB port, which is a special, easily accessible opening on a computer or mobile device

37. Memory and Storage A memory card is removable flash memory, usually no bigger than 1.5 inches in height or width, that you insert in and remove from a slot in a computer, mobile device, or card reader/writer.

38. Memory and Storage An optical disc is a type of storage media that consists of a flat, round, ­portable metal disc made of metal, plastic, and lacquer that is written and read by a laser. CD DVD

39. Memory and Storage An external hard drive is a separate, portable, freestanding hard disk or SSD that usually connect to the computer with a cable. The entire external hard drive is enclosed in an airtight, sealed case.

40. Memory and Storage Cloud storage is an Internet service that provides remote storage to computer users. Cloud storages are also used for backups . A backup is a duplicate of content on a storage medium that you can use in case the original is lost, damaged, or destroyed. JustCloud.com

41. Communication Device A communications device is a hardware component that enables a computer to send ( transmit) and receive data, instructions, and information to and from one or more computers. A widely used communications device is a modem others are wifi device, NIC (network interface card). Communications occur over cables, telephone lines, cellular radio networks, satellites, and other transmission media.

42. Discovering Computers 2012: Chapter 1 42 Page 7 Figure 1-3

43. Advantages and Disadvantages of Using Computers Advantages of Using Computers Disadvantages of Using Computers Discovering Computers 2012: Chapter 1 43 Pages 9 - 10

44. Examples of Computer Usage Discovering Computers 2012: Chapter 1 44

45. Examples of Computer Usage Discovering Computers 2012: Chapter 1 45

46. Computer Applications in Society Discovering Computers 2012: Chapter 1 46

47. Computer Applications in Society Discovering Computers 2012: Chapter 1 47