An, ID ten T error

I was having trouble with my computer. So I called Bob the computer guy, to come over. Bob 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?"



The computer guy 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 out ....... I D 1 0 T