Idiot

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