Most QWERTY computer keyboards use a single rubber-like membrane underneath the keys that makes contact with a circuit board when the key is fully depressed. Also called a "dome switch keyboard ...

From different keyboard layouts and switch types ... transfers your keystroke from the keycap to the underlying circuit board. Membrane keyboards are relatively inexpensive, and they're great ...

A key switch is a small physical mechanism that sits under every key and tells your keyboard's PCB ("printed circuit board") when you ... types - mechanical and membrane being the most popular ...