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Introduction what is computer
1) Computers are electronic devices that operate under stored instructions to process data according to those instructions. 2) A computer consists of both hardware and software components. The hardware includes input, output, and storage devices, as well as the system unit containing electronic components like the CPU and memory. Software provides instructions for the computer's operation. 3) Computers are used in many aspects of modern society from education and business to entertainment and communication. They allow people to perform tasks more efficiently and share information globally through networks and the internet.
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Introduction what is computer
- 1. Living in aDigital World Discovering Computers 2010 Ahmad Idrees
- 2. A World ofComputers • Computers are everywhere 2Ahmad Idrees
- 3. What Is aComputer? • A computer is an electronic device, operating under the control of instructions stored in its own memory 3Page 6 Information Processing Cycle
- 4. What Is aComputer? 4Page 6 Figure 1-2
- 5. The Components ofa Computer 5Pages 6 - 8
- 6. The Components ofa Computer 6Page 7 Figure 1-3
- 7. The Components ofa Computer What is an input device? Hardware used to enter data and instructions into a computer e.g, keyboard, mouse, microphone, scanner and web cam etc. 7
- 8. The Components ofa Computer What is an output device? Hardware that conveys information to one or more people e.g. printer, monitor and speakers etc. 8
- 9. The Components ofa Computer What is the system unit? Case containing Electronic components used to process data. 9
- 10. The Components ofa Computer What are two main components on the motherboard? Central Processing Unit (CPU)Central Processing Unit (CPU) Also called a processor. The electronic component that interprets and carries out the basic instructions that operate the computer. MemoryMemory Consists of electronic components that store instructions waiting to be executed and data needed by those instructions 10
- 11. The Components ofa Computer What is storage? Storage mediaStorage media Physical material on which data, instructions, and information are stored e.g. USB flash drive, hard disks, optical discs and memory cards.. Storage mediaStorage media Physical material on which data, instructions, and information are stored e.g. USB flash drive, hard disks, optical discs and memory cards.. Holds data, instructions, and information for future use 11
- 12. The Components ofa Computer What is a USB flash drive? Provides much greater storage capacity than a floppy disk Portable storage device small and lightweight enough to be transported on a keychain or in a pocket. 12
- 13. The Components ofa Computer What is a hard disk? Provides greater storage capacity than a floppy disk or USB flash drive Most are housed inside of the system unit 13
- 14. The Components ofa Computer What is a optical disc? Flat, round, portable metal disc e.g. CDs, DVDs. 14
- 15. The Components ofa Computer What is a communications device? Hardware component that enables a computer to send and receive data, instructions and information Occurs over cables, telephone lines, cellular networks, satellites, and other transmission media 15
- 16. Computer Applications inSociety 16
- 17. Computer Applications inSociety 17
- 18. Advantages and Disadvantages ofUsing Computers Advantages of Using Computers Disadvantages of Using Computers 18
- 19. Advantages and Disadvantages ofUsing Computers • Green computing involves 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 19
- 20. Networks and theInternet • A network is a collection of computers and devices connected together through transmission media. 20
- 21. To shareTo share Networksand the Internet What are the reasons to network? ResourcesResources Hardware devices Hardware devices Software programs Software programs DataData To save time and money To save time and money InformationInformation 21
- 22. Networks and theInternet What is a server? A server manages the resources on a network Clients access the resources on the server 22
- 23. Networks and theInternet What is the Internet? Worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals 23
- 24. Networks and theInternet What is the Web? A Web site is a collection of related Web pages A Web site is a collection of related Web pages A Web page contains text, graphics, sound, video, and links to other Web pages A Web page contains text, graphics, sound, video, and links to other Web pages You can share information by creating Web pages or posting photos on a photo sharing community You can share information by creating Web pages or posting photos on a photo sharing community Billions of documents, called Web pages, available to anyone connected to the Internet 24
- 25. Networks and theInternet • People use the Internet for a variety of reasons: 25
- 26. Computer Software • Software,also called a program,consists of series of instructions that tells the computer what tasks to perform and how to perform them 26
- 27. Computer Software What issystem software? Operating System (OS)Operating System (OS) is a set of programs that coordinates all activities among computer hardware devices and allows users to run application software Operating System (OS)Operating System (OS) is a set of programs that coordinates all activities among computer hardware devices and allows users to run application software Utility ProgramsUtility Programs allow the user to perform maintenance-type tasks usually related to managing a computer, its devices or its programs Utility ProgramsUtility Programs allow the user to perform maintenance-type tasks usually related to managing a computer, its devices or its programs Programs that control or maintain the operations of the computer and its devices 27
- 28. Computer Software What isapplication software? Presentation Graphics Spreadsheet Database Word Processing Programs that perform specific tasks for users 28
- 29. Computer Software • Aprogrammer develops software or writes the instructions that direct the computer to process data into information 29
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- 31. Personal Computers • Apersonal 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 31
- 32. Mobile Computers andMobile Devices 32
- 33. Mobile Computers andMobile Devices 33
- 34. Mobile Computers andMobile Devices 34
- 35. Game Consoles • Agame console is a mobile computing device designed for single-player or multiplayer video games 35
- 36. Servers • A servercontrols access to the hardware, software, and other resources on a network – Provides a centralized storage area for programs, data, and information 36
- 37. Mainframes • A mainframeis a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously 37
- 38. Supercomputers • A supercomputeris the fastest, most powerful computer – Fastest supercomputers are capable of processing more than one quadrillion instructions in a single second 38
- 39. Embedded Computers • Anembedded computer is a special-purpose computer that functions as a component in a larger product 39
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- 41. Elements of anInformation System 41
- 42. Elements of anInformation System 42
- 43.