F451 Components of a Computer System

A summary of Unit 1 in F451 Computing in one place

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  • Created by: Amsee
  • Created on: 30-04-10 18:41

Components of a Computer System

Hardware

The physical units that make up a computer system

CPU

Controls data transmission, processing and information output

Main Memory

Holds instructions and data

Binary Digit

bits, which can be grouped together in groups of 8 bytes, with 2^8 combinations

1 byte = 1 character

RAM

Volatile, and stores programs which are currently running and data being processed

ROM

Non-Volatile, holds the bootstrap loader to load operating system from memory

Cache

Very fast memory which improves the computer's speed, storing most frequent and recent files for quick retreval

Peripheral

A device which is external to the CPU

Auxiliary Storage

Non volatile storage required by computer systems to store data and programs

Input Device

Used to input DATA

Output Device

Used to output INFORMATION

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