•
Background extinction rate •
Background independence, a condition in theoretical physics •
Background noise •
Background radiation, the natural radiation that is always present in a location •
Background (astronomy), small amounts of light coming from otherwise dark parts of the sky •
Cosmic background (disambiguation) •
Gravitational wave background •
X-ray background •
Background process, software that is running but not being displayed •
String background •
Computer wallpaper • bKGD, an
ancillary chunk in the PNG file format ==Other uses==