What do we mean by general
purpose?
Most devices can be described by their function e.g
Washing Machine, DVD Player
Computers, however, can be used for almost any
purpose:
- typewriter
- video editor
- accounts tracker
- database / address book
- DVD / CD Player
- and many others
Components of a Computer System
Computer Systems are made up of:
Hardware – the physical parts
Software - the instructions or programs that
Types Of Computer
Mainframe Computer
Minicomputer
Personal Computer (Microcomputer / Desktop)
Laptop
Network Computer / Server
– Uses two types of terminal: “Dumb” and “Intelligent
control the hardware
The Human Being – the brains behind the
whole system!
Computers Are Programmable
Computers repond to instructions in the form of
programs
Programs are written in order to make
computers behave in specific ways i.e. word
processor, systems control
Programs are stored in the Computer memory
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