INTRODUCTION TO COMPUTER
- 2. What Is a Computer? How is a computer defined? Electronic device operating under the control of instructions stored in its own memory The computer first, Accepts data such as raw facts, figures, and symbol then, Processes data into information (Data that is organized, meaningful, and useful ) finally, Produces and stores results 2
- 3. What is the information processing cycle? Input Process Output Storage Communication 3
- 4. The Components of a Computer What is an _____ device? input Hardware used to enter data and instructions 4
- 5. The Components of a Computer What is an ______ device? output Hardware that conveys information to a user 5
- 6. The Components of a Computer What is the system unit? Box-like case containing electronic components used to process data 6
- 7. What is magical inside the black box? Memory card Video Card Power Supply Sound Card 7
- 8. The Components of a Computer What are two main components on the motherboard? Central Processing Unit (CPU) Also called a processor Carries out instructions that tell computer what to do Memory Temporary holding place for data and instructions 8
- 9. The Components of a Computer What is storage? Holds data, instructions, and information for future use Storage media Physical material on which data, instructions, and information are stored Storage device Records and retrieves items to and from a storage medium 9
- 10. Storage device What is a floppy disk? Thin, circular, flexible disk enclosed in rigid plastic shell A Zip® disk looks similar but has much greater storage capability (=170 floppy disk) 10
- 11. The Components of a Computer What is a hard disk? Provides much greater storage capacity than a floppy disk or Zip® disk Housed inside the system unit 11
- 12. The Components of a Computer What is a compact disc? Flat, round, portable metal disc CD-ROM CD-RW Capacity: 673~768 MB DVD-ROM DVD+RW Capacity:4.7 ~ 17.1 GB 12
- 13. The Components of a Computer What is miniature storage media? Portable, thin memory cards used in: Digital cameras Handheld computers 13
- 14. Why Is a Computer So Powerful? What makes a computer powerful? Speed Reliability Accuracy Storage Communications 14
- 16. Categories of Computers What are the categories of computers? Personal computers (desktop) Minicomputers Mainframe computers Supercomputers 16
- 17. Personal computers (desktop) Microcomputers are the most common kind of computers used by people today, whether in a workplace, at school or on the desk at home. The term “microcomputer” was introduced with the advent of single chip microprocessors.
- 18. Minicomputers A minicomputer (colloquially, mini) is a class of multi-user computers that lies in the middle range of the computing spectrum, in between the smallest multi-user systems (mainframe computers) and the largest single-user systems (microcomputers ). The contemporary term for this class of system is midrange computer, such as the higher-end SPARC, POWER and Itanium -based systems from Oracle Corporation. E.g.- Laboratory computers
- 19. Mainframe computers The term mainframe computer was created to distinguish the traditional, large, institutional computer intended to service multiple users from the smaller, single user machines. These computers are capable of handling and processing very large amounts of data quickly. Mainframe computers are used in large institutions such as government, banks and large
- 20. Supercomputers A supercomputer is focused on performing tasks involving intense numerical calculations such as weather forecasting, fluid dynamics, nuclear simulations, theoretical astrophysics, and complex scientific computations.
- 21. Personal Computers What are the two most popular series of personal computers? PC and compatibles use the Windows operating system Apple Macintosh uses the Macintosh operating system (Mac OS) 21
- 22. Personal Computers What is a notebook computer? Portable, small enough to fit on your lap(2 lbs to 9 lbs ) Also called a laptop Generally more expensive than a desktop computer 22
- 23. Handheld Computers What is a tablet PC? Resembles a letter-sized slate Allows you to write on the screen using a stylus Smaller version is the modular computer What are Web-enabled handheld computers? Allow you to check e-mail and access the Internet Web-enabled telephone is a “smart phone” 23
- 24. Handheld Computers What is a personal digital assistant (PDA)? Provides personal organizer functions Calendar Appointment book Address book Calculator Notepad 24
- 25. Examples of Computer Usage What are five categories of computer users? Home Large Business Small Office/ Home Office (SOHO) Mobile Power 25
- 26. Computer Applications in Society What are some examples of computer applications in society? Education Finance Government Healthcare Science Publishing Travel Industry 26
- 27. Conclusion Who needs nuclear weapons when you have the power of the internet ~ Leah Wakefield 27