types and components of computer systems by: reem hasayen zvwxwy
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Types and components of computer systems
By: Reem Hasayenhttp://www.youtube.com/watch?
v=N2vARzvWxwY
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Definition of a ComputerA computer is an electronic device used to process data, converting the data into information that is useful to people
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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.
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Computers Consist of Four Parts
Hardware
Software
Users
Data
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HardwareMechanical devices that make up the computerExternal Hardware
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HardwareInternal Hardware
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ProcessingThe procedure that transforms raw data into useful information is called processingThe processor and memory perform this transformation
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ProcessorThe computer’s brain, which organizes and carries out instructions from either the user or the software
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Circuit board
Motherboard is an example of a circuit board
Attached to the motherboard are many smaller circuit boards that house many internal devices
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Software
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PracticeSoftware :
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
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Memory ( RAM and ROM)When you launch a program, it is loaded into and run from memory
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Random Access Memory (RAM)Determines a computer’s speed and power
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Memory Measurements
Kilobyte (KB)
Megabyte (MB)
Gigabyte (GB)
Terabyte (TB)
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Input DevicesAccept data and instructions from the user or from another computer system
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Most Common Input Devices
Keyboard
Mouse
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Output DevicesReturn processed data to the user or to another computer system
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Most Common Output Devices
Monitor
Printer
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StorageHolds data permanently
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Storage Terms
Magnetic disk
Disk drive
Hard disk or hard drive
Diskettes or floppy disks
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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)
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SoftwareA set of electronic instructions consisting of complex codes, or programs, that make the computer perform tasks
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Examples of Software
System software
Application software
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Five Computer Categories
Supercomputers
Mainframe computers
Minicomputers
Workstations
Microcomputers, or personal computers