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Computer System

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The inside of the system unit on a desktop personal computer.
• Motherboard
• Adapter card
• Processor
• Memory

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Def: Motherboard is the main circuit board of the system unit, that contains integrated circuits
Func: Holds many components of the system

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Def: The processor, also called the central processing unit (CPU), interprets and carries out the basic instructions that operate a computer

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Def: Slot on the motherboard that can hold adapter card
Func: For adding more memory, graphics capabilities and support special devices

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System Unit: A computer case is also known as a computer chassis / tower / base unit / system unit

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Def: slot on the motherboard that hold memory modules

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Component of Motherboard:
• Processor slot
• Adapter card slot
• Memory slot

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Def: Slot on the motherboard that houses a CPU
Func: forms the electrical interface with the CPU

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Def: Memory consists of electronic components that store instructions waiting to be executed by the processor, data needed those instructions, and the results of the processing data

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Control Unit:
Is the component of the processor that directs and coordinates most of the operations in the computer

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Arithmetic Logic Unit:
Performs arithmetic, comparison and other operations

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Machine Cycle:

The operations performed by the CPU to execute any instruction

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Machine Cycle:
1. Fetch
2. Decode
3. Execute
4. Store

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Component of processor:
• Control unit
• Arithmetic

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Types of memory:
• Volatile
• Nonvolatile

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Input Device
Def: Any hardware component allows users to enter data and instructions into a computer

Output Device
Def: Any type of hardware components that conveys information to one or more people

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Volatile
Def: RAM is the most common type of volatile memory

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Types of RAM:
• DRAM (Dynamic RAM )
• SRAM (Static RAM )
• MRAM (Magnetoresistive RAM)

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Types of ROM:
• PROM (Programmable Read- Only Memory)
• EPROM (Erasable Read-Only Memory)
• EEPROM (Electrically Erasable Programmable Read- Only Memory)

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Nonvolatile
Def: Nonvolatile memory does not lose its contents

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Types of input devices:
• Keyboard - Contains keys users press to enter data and instructions into a computer
• Pointing device - Control a pointer on the screen
• Microphone - Speak into the computer
• Webcam - Capture videos and images

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Types of Output Devices:
• Display devices - Convey information to the user in the form of text, graphics, and video
• Speakers - Convey information to the user in the form of music, speech and other sounds
• Data projector - Takes the next and images displaying on a screen them on a larger screen