Funny Computer Joke

HAROLD THE COMPUTER GUY

I was having trouble with my computer, so I called Harold, the computer guy, to come over.Harold clicked a couple of buttons and solved the problem. He gave me a bill for a minimum service call.As he was walking away, I called after him, "So, what was wrong?"He replied, "It was an ID ten T error."I didn't want to appear stupid, but nonetheless inquired, "An ID ten T Error? What's that - in case I need to fix it again?"Harold grinned.... "Haven't you ever heard of an ID ten T error before?""No," I replied."Write it down," he said, "and I think you'll figure it out."So I wrote it down.
I D 1 0 T
I used to like Harold...