Do you ever get annoyed by people who use acronyms followed by words contained in the acronym itself? I used to, and was talking to someone today who does and it reminded me of some great examples. She brought up GPS System, and then I mentioned HIV Virus and ATM Machine. Other examples include such gems as PIN Number, and probably some that I can't think of right now.
On a semi-related note, one time on vacation in California we stopped by the La Brea Tar Pits (I know, probably not on every family's list of favorite vacations spots, but my dad is a huge natural history buff) which if you translate the Spanish portions ends up being The The Tar Tar Pits.