The World Doesn't Like A Smartass

I had a problem with my computer yesterday, so I called Eric, the 11 year old next door, (whose bedroom looks like NASA Mission Control), and asked him to come over. 

Eric 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.' Eric 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:

ID10T  

I used to like Eric, the little bastard.