computer systems

index > 2.1.1 Fundamentals of computer systems

What is a computer?

A computer is an electronic device which processes data into useful information. A system works to fulfill a set purpose. A computer system is a collection of hardware and software that works together to achieve a data processing task.


Data is input and converted into the computer's internal representation (binary) by the input devices. The data is then processed and the returns are output by an output device. The data may be stored for later use or transmitted to another computer system.

Computer System Inputs Outputs Processing
Calculator Numbers, operations Results Addition, subtraction, multiplying, division ect.
Navigator GPS location, user inputted addresses Route, warnings, time taken Positioning, calculating speed and time, calculating fastest routes
Booking system Names, location, dates, credit card details Costs, tickets, maps, travel information Checking availability, producing document and tickets