You know what bugs me? RAS Syndrome. For the uninitiated, it stands for Redundant Acronym Syndrome syndrome and applies to things like 'PIN number' (Personal Identification Number number) or 'ATM machine' (Automated Teller Machine machine).
I saw a horrible version today. Newcastle's Greenmarket car park has closed down, and there was a sign to say so. 'NCP Car Park closed from 8th July.'
That stands for National Car Park Car Park.