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.
Over-Voltage & Surges: are short duration increases in the mains supply voltage which generally last several cycles. Formal Definition â Voltage above 110% of the rated voltage for 1 or more cycles. Typical Symptoms-When surges occur equipment can suffer from premature failure.