Hardware.

Comparing the brain and human body to the computer systems.

Inputs:
Keyboard
Mouse
Sight
Smell
Touch
Speech
Hearing

Processing:
Brain
CPU
Output:
Printers
Bodily functions.

Storage:
Hard drive- Magnetic Drives
SSD Drives- Solid State Drives
RAM- Random Access Memory
ROM- Random Only Memory

History of Computers:
BBC Computers had an operating system on a ROM.
Commodore 64 and 128
Sir Clive Sinclair ZX 81 Spectrum
5 1/4 inch floppy disk
3 1/2 inch floppy disk.
Magnetic Tape Drives.

Hardware = Physical System
Software = The stuff to make it work.
Operating  System =  Windows 3.1, Windows and DOS in the old days.