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Computer System & Concepts
Upon completion, you should be able to: Define the concept of a computer and identify its fundamental characteristics. Categorize computers based on their size, functionality, and intended purpose. Explain the primary components essential for the operation and overall functionality of a computer system.
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Computer Science Terminologies & Computer Characteristics
Basic Functioning of A Computer & Classification
Terminals – Output devices Computer science topic GCE A level
Printers – Output devices GCE AL Computer science topic
Monitor – Output devices Computer science topic GCE A level
Comparison/ Differences between LCD and CRT – Output devices topic GCE A level
Keyboard, Pointing Devices Input devices computer science – GCE AL
Speech Recognition System : Input devices Computer science topic- GCE A level Lesson
Revision Computer Science GCE A/L – Past Questions / Answers

Basic Functions of A Computer

A Computer is made up of two parts, hardware and software. 

A Hardware refers to all the physical devices that make up a computer system, both those inside the computer “case” and those outside the case, like keyboard, monitor and mouse.

Software refers to the programs the computer executes. For example, the word processor Microsoft Word, is software, as is a program that enables a cell phone display so the user can select for example a new ring-tone.

Basic Functioning of A Computer - Computer Science Lesson

Every task given to a computer follows an Input- Process- Output Cycle (IPO cycle). It needs certain data, processes that data and produces the desired information. The input unit takes the input (data), the central processing unit (CPU) does the processing of data and the output unit produces the output (information). The memory unit holds the data and instructions during the processing.

Classification of Computers

Computers can be classified according to physical size, functionality and purpose.

According to purpose

According to purpose, we can distinguish three types of computers:

  • General purpose computers,
  • Special purpose computers and
  • dedicated computer.

 

 

 

 

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