Types and components of computer systems

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Presentation transcript:

Types and components of computer systems By: Reem Hasayen http://www.youtube.com/watch?v=N2vAR zvWxwY

The Four Parts of a Computer

Definition of a Computer A computer is an electronic device used to process data, converting the data into information that is useful to people

What makes a computer powerful? Speed A computer can do billions of actions per second. Reliability Failures are usually due to human error, one way or another. Storage A computer can keep huge amounts of data.

Computers Consist of Four Parts Hardware Software Users Data

Hardware Mechanical devices that make up the computer External Hardware

Hardware Internal Hardware

Processing The procedure that transforms raw data into useful information is called processing The processor and memory perform this transformation

Processor The computer’s brain, which organizes and carries out instructions from either the user or the software

Circuit board Motherboard is an example of a circuit board Attached to the motherboard are many smaller circuit boards that house many internal devices

Software

Practice Software : http://www.teach-ict.com/gcse_new/software/types_software/quiz/matchup_software.htm Types of computer http://www.teach-ict.com/gcse_new/computer%20systems/types_computer/quiz/halfmin_types.htm Input Devices http://www.teach-ict.com/gcse_new/computer%20systems/input_devices/quiz/matchup_input.htm

Memory ( RAM and ROM) When you launch a program, it is loaded into and run from memory

Random Access Memory (RAM) Determines a computer’s speed and power

Memory Measurements Kilobyte (KB) Megabyte (MB) Gigabyte (GB) Terabyte (TB)

Input Devices Accept data and instructions from the user or from another computer system

Most Common Input Devices Keyboard Mouse

Output Devices Return processed data to the user or to another computer system

Most Common Output Devices Monitor Printer

Storage Holds data permanently

Storage Terms Magnetic disk Disk drive Hard disk or hard drive Diskettes or floppy disks

Storage Terms Continued CD-ROM drive Compact disks (CDs) Compact Disk-Read-Only Memory (CD-ROM) CD-Recordable (CD-R) CD-ReWritable (CD-RW) Digital Video Disk (DVD)

Software A set of electronic instructions consisting of complex codes, or programs, that make the computer perform tasks

Examples of Software System software Application software

Five Computer Categories Supercomputers Mainframe computers Minicomputers Workstations Microcomputers, or personal computers

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