Analogue data - if being sent to a computer, it must be converted into digital data. done by hardware known and analogue to digital converter (ADC)

Digital data - if computer controlling a device then digital needs to be converted to analogue so done by digital to analogue converted (DAC)

Main Components of a Computer - 1. Input Devies
2. Output devices
3. CPU
4. Internal hard disk drive
5. RAM
6. ROM.
7. Secondary Storage Devices

Input devices - Hardware devices that allow data to be input into a computer. keyboard, mouse, camera, mic, scanner

Output devices - Hardware devices that allow data to be output from a computer. monitor, printer, speakers, projector, graph plotter

Secondary Storage Devices eg. - hard disk drive, solid-state device, pendrive

CPU - Central Processing Unit is that part of the computer that interprets and executes the commands from the computer hardware and software. made of up control unit, arithmetic and logic unit, and RAM