Name fields in general.

But sometimes I don't have control, e.g. another person is inputting the data and dutifully duplicates my name. That's how I ended up with the 2 phone calls/3 person situation, which happened about a month ago.

Hell, my driver's license is missing the apostrophe because the system doesn't accept it.

When somebody is trying to find me in a computer there's a whole litany of things they have to try, including assuming "First O'Lastame" got bashed into "First O. Lastname".

I think about this every time I read an article extolling the wonders of technology.