< Introduction to Computers
Introduction to Computers ? What is a computer
This page is part of the Introduction to Computers project.
Completion status: this resource has reached a high level of completion.
What is a computer?
A computer is a machine that manipulates data according to a list of instructions. A computer can also be defined as an electronic machine that accepts input (data), processes it and gives out results(information) A computer is an electronic device that can perform a variety of operation in accordance with a set of instruction called program. It can process input
and produces output.
Computer organization at a glance
A basic computer consists of three major components: CPU (Central Processing Unit), IO (Input/Output) and Memory as illustrated in Figure
Data comes through the Input and the CPU processes the data, based on a program which is in Memory. The result is returned to Memory or is presented to the user.
The CPU itself consists of an Arithmetic and Logic Unit (ALU), a Control Unit (CU) and Registers.
[edit] A Computer-based system
A computer-based system is a system in which a computer is involved and consists of three major elements: Hardware, Software, and User. The elements of a computer based system are described in the three following scenarios:
Registration in a Univers
Hardware = Micro computers, Network platform, and a Server Computer
Software = Student Registration Application, Database, and Operating System
User = Operators, Administrators
Controlling a section of an Assembly Line
Hardware = A specially embedded system which is developed for this purposeSoftware = The machine code loaded on the embedded system Memory
User = Other Machine, Supervisor
Playing a game with a Computer
Hardware = Game console such as XBox, Playstation
Software = The game itself
User = The game player
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