[wiki]Category:Hardware[/wiki]
[wiki="File:ZX81_PCB.jpg"]thumb|200px|right|The PCB from a Sinclair ZX81 computer, before components are added.[/wiki]
A printed circuit board (PCB) is a flat board on which electrical or electronic components are mounted. The board itself is made from an insulating material. Paths between components are made from conductive (usually copper) tracks which are fixed permanently to the board.