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Computer  Lecture 1
 

Computer Lecture 1

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    Computer  Lecture 1 Computer Lecture 1 Presentation Transcript

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