A system of numbers using only two digits, 0 and 1 (also known as base-2)

CPU

Central Processing Unit of the computer containing the control unit, ALU and cache memory

Control Unit

Works with the CPU to control the flow of data within the system

ALU

The ALU performs arithmetic and logical operations within the CPU

RAM

Random Access Memory, the main memory of a computer that stores data, applications and the operating system whilst in use.

Cache Memory

High speed memory used by a computer

Flash Memory

Solid-state memory used as low cost secondary storage in portable devices and as removable memory

Solid State

Technology that has no moving parts, for example transistors and capacitors as used in memory chips

Secondary Storage

Non-volatile storage used to store programs and files that need to be kept when the power is not on