A function key is a key on a computer or terminal keyboard which can be programmed so as to cause an operating system command interpreter or application program to perform certain actions, a form of soft key. On some keyboards/computers, function keys may have default actions, accessible on power-on.
Surge definition, a strong, wavelike, forward movement, rush, or sweep: the onward surge of an angry mob. See more.
A Surge Protector is a device that is designed to protect PCs, servers, network equipment, audio/video equipment, computer peripherals and other electronic devices from damaging power surges and line noise interference.