Basic Computing Using Windows: Computers and Peripherals — by Wikibooks contributors

Defines what hardware and a computer are, noting that everything from phones to smart TVs counts. It then describes the separate parts of a desktop computer and gives examples of computers without screens.

A free Wikibook for people with little computer experience that moves from the basics toward more advanced topics. Chapters cover buying a computer, security, office programs, the internet, networking and keeping a PC running smoothly. Its examples mostly use Windows XP, so menus look dated.

A short chapter separating internal hardware from external devices and describing the main parts. These include the CPU, power supply, motherboard, memory, drives, video cards, input and output devices and casings, plus units of information.