I was often left puzzled by some of the emails I received when doing empeg support. Inappropriate terminology was a bigger problem though. Lots of people talked about using serial when they meant USB and vice-versa. The Ethernet jack was described as the phone socket by one user, which lead me to think they had a Rio Reciever.
I've been guilty of similar things though. One user wondered why I was talking about Apple Macs when I mentioned MAC addresses. Another queried what the phone number was for the 'empeg BBS' - I'd mentioned it on the phone and he assumed that it was an old-fashioned dial-up BBS.