joke the ID ten T error

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 down ....... I D 1 0 T

I used to like Harold ...