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.
Surge. Alternatively known as a line surge or power surge, a surge is a short, fast rise in voltage that inherently causes an increase in electrical current or vice versa. Exclusive to electrical circuits, a power surge can cause damage or impairment to a computer or other devices.For example, the standard voltage rating on a landline in the United States is 120V. If this rating is exceeded for more than three nanoseconds, it would be considered a surge, any shorter duration is a spike.Tip: Users can help prevent damage from power surges with surge protectors.or example, the standard voltage rating on a landline in the United States is 120V. If this rating is exceeded for more than three nanoseconds, it would be considered a surge, any shorter duration is a spike.