Basic concepts of computing

Every computer — from a smartwatch to a supercomputer — follows the same general model: Input, Processing, Output and Storage (the IPO+S model). Data goes in, the processor transforms it, information comes out, and both…

A computer system needs both hardware (the physical parts you can touch) and software (the programs and instructions that tell the hardware what to do). Neither is useful without the other.

Computers come in many sizes and power classes, each suited to a purpose — from tiny embedded controllers inside appliances to supercomputers that model the weather.

Computers transform how we work, learn and communicate — but they also carry costs and risks. A balanced answer always shows both sides.

Organisations live on data. Managing it well means collecting it accurately, storing it safely, processing it into information, and protecting it from loss or misuse.