You are way confused.
A real computer is an expensive item that must be used efficiently.
That means running jobs in batch mode, not letting someone fiddle
with front panel switches.
You must be thinking of a wimpy Programmable Data Processor,
not a Real Computer. (As in, "Call me when you get a real computer.")
- Joe
P.S. What the hell is an "LED"? Is that some sort of light bulb?