Chording

Chording means pushing several keys or buttons simultaneously to achieve a result.

For example, in the Unix graphical user interface (known as X11), the middle button is used to paste text.

TipTapSpeech an application for the iPhone and iPad is a chord-based text entry solution for touch screen computing.

ComboKey also allows one-hand typing with the hand holding the device, generating combinations by occasional swipes to other keys.

Douglas Engelbart, Cherif Algreatly, Valerie Landau, Robert Stephenson, Evan Schaffer, and Eric Matsuno filed a patent in 2010 for a chorded solution for multitouch screens.

A Piano player performing a C Minor 7 Chord (music) .
It is common for a person playing a PC game to simultaneously hold down the following keys: "Left Shift" for sprinting, "W" for moving forward, and "Space" for jumping.