OVERVIEW OF COMPUTER SYSTEMS <ul><li>Parts Of A Computer System. </li></ul><ul><li>Looking Inside The Machine. </li></ul><...
 
PARTS OF A COMPUTER <ul><li>What is a computer </li></ul><ul><li>Hardware </li></ul><ul><li>Software </li></ul><ul><li>Dat...
 
WHAT IS A COMPUTER <ul><li>A computer is an electronic device used to process data. </li></ul><ul><li>A computer can conve...
HARDWARE <ul><li>A computer's hardware consists of electronic devices; the parts you can see and touch. </li></ul><ul><li>...
 
SOFTWARE <ul><li>Software – also called programs – consists of organized sets of instructions for controlling the computer...
DATA <ul><li>Data consists of raw facts, which the computer can manipulate and process into information that is useful to ...
 
USERS <ul><li>People are the computer's operators, or users.  </li></ul><ul><li>Some types of computers can operate withou...
TYPES OF COMPUTERS <ul><li>Supercomputers  </li></ul><ul><li>Mainframe Computers  </li></ul><ul><li>Minicomputers  </li></...
SUPERCOMPUTERS <ul><li>Supercomputers are the most powerful computers. They are used for problems requiring complex calcul...
Cray T90 Supercomputer
MAINFRAME COMPUTERS <ul><li>Mainframe computers can support hundreds or thousands of users, handling massive amounts of in...
 
MINI COMPUTERS <ul><li>Minicomputers are smaller than mainframes but larger than microcomputers.  </li></ul><ul><li>Minico...
Minicomputer
MICROCOMPUTERS <ul><li>Microcomputers are more commonly known as personal computers. The term &quot;PC&quot; is applied to...
Handheld PC Philips Velo
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Computer Lecture 1

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Computer Lecture 1

  1. 1. OVERVIEW OF COMPUTER SYSTEMS <ul><li>Parts Of A Computer System. </li></ul><ul><li>Looking Inside The Machine. </li></ul><ul><li>Software: Bringing Machine To Life. </li></ul>
  2. 3. PARTS OF A COMPUTER <ul><li>What is a computer </li></ul><ul><li>Hardware </li></ul><ul><li>Software </li></ul><ul><li>Data </li></ul><ul><li>Users </li></ul>
  3. 5. WHAT IS A COMPUTER <ul><li>A computer is an electronic device used to process data. </li></ul><ul><li>A computer can convert data into information that is useful to people. </li></ul><ul><li>A complete computer system includes four distinct parts: </li></ul><ul><ul><li>Hardware </li></ul></ul><ul><ul><li>Software </li></ul></ul><ul><ul><li>Data </li></ul></ul><ul><ul><li>User </li></ul></ul>
  4. 6. HARDWARE <ul><li>A computer's hardware consists of electronic devices; the parts you can see and touch. </li></ul><ul><li>The term &quot;device&quot; refers to any piece of hardware used by the computer, such as a keyboard, monitor, modem, mouse, etc. </li></ul>
  5. 8. SOFTWARE <ul><li>Software – also called programs – consists of organized sets of instructions for controlling the computer. </li></ul><ul><li>Some programs exist for the computer's use, to help it manage its own tasks and devices. </li></ul><ul><li>Other programs exist for the user, and enable the computer to perform tasks for you, such as creating documents. </li></ul>
  6. 9. DATA <ul><li>Data consists of raw facts, which the computer can manipulate and process into information that is useful to people. </li></ul><ul><li>Computerized data is digital, meaning that it has been reduced to digits, or numbers. The computer stores and reads all data as numbers. </li></ul><ul><li>Although computers use data in digital form, they convert data into forms that people can understand, such as text, numerals, sounds, and images. </li></ul>
  7. 11. USERS <ul><li>People are the computer's operators, or users. </li></ul><ul><li>Some types of computers can operate without much intervention from people, but personal computers are designed specifically for use by people. </li></ul>
  8. 12. TYPES OF COMPUTERS <ul><li>Supercomputers </li></ul><ul><li>Mainframe Computers </li></ul><ul><li>Minicomputers </li></ul><ul><li>Microcomputers, or Personal Computers </li></ul>
  9. 13. SUPERCOMPUTERS <ul><li>Supercomputers are the most powerful computers. They are used for problems requiring complex calculations. </li></ul><ul><li>Because of their size and expense, supercomputers are relatively rare. </li></ul><ul><li>Supercomputers are used by universities, government agencies, and large businesses. </li></ul>
  10. 14. Cray T90 Supercomputer
  11. 15. MAINFRAME COMPUTERS <ul><li>Mainframe computers can support hundreds or thousands of users, handling massive amounts of input, output, and storage. </li></ul><ul><li>Mainframe computers are used in large organizations where many users need access to shared data and programs. </li></ul><ul><li>Mainframes are also used as e-commerce servers, handling transactions over the Internet . </li></ul>
  12. 17. MINI COMPUTERS <ul><li>Minicomputers are smaller than mainframes but larger than microcomputers. </li></ul><ul><li>Minicomputers usually have multiple terminals. </li></ul><ul><li>Minicomputers may be used as network servers and Internet servers. </li></ul>
  13. 18. Minicomputer
  14. 19. MICROCOMPUTERS <ul><li>Microcomputers are more commonly known as personal computers. The term &quot;PC&quot; is applied to IBM-PCs or compatible computers. </li></ul><ul><li>Full-size desktop computers are the most common type of PC. </li></ul><ul><li>Notebook (laptop) computers are used by people who need the power of a desktop system, but also portability. </li></ul><ul><li>Handheld PCs (such as PDAs) lack the power of a desktop or notebook PC, but offer features for users who need limited functions and small size. </li></ul>
  15. 20. Handheld PC Philips Velo
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