Computer Devices

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Computer Devices
Study Lesson Computer
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Primary 4
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Processing Device
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• The only processing device is CPU.
• CPU stands for Central Processing Unit.
• CPU is the brains of a computer where all
  information sent into the computer is processed.
• Basically CPU divided into 3 parts
• 1. ALU (Arithmetic Logic Unit) Calculations
• 2. CU (Control Unit) Information flow
• 3. MU (Memory Unit) To hold the memory unit
  processed data

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ALU (Arithmetic Logic Unit)
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CU (Control Unit)
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MU (Memory Unit)
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Memory

• Memory is a storage capacity of a computer types
  of memory.
• Primary Memory
• RAM (Random Access Memory)
• ROM ( Read Only Memory)
• Secondary Memory
• Floppy Disk
• Hard disk
• CD
• DVD
• Flash Disk

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Primary Memory/Secondary Memory
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Floppy Disk
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Hard Disk
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Flash Disk
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CD (Compact Disk)
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DVD (Video Compact Disk)
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