Computer Problems

I was having trouble with my computer. So I called David,
the 11 year old next door whose bedroom looks like Mission Control,
and asked him to come over.

David clicked a couple of buttons and solved the problem.

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."

David 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