In my "CROTCHETY" article on June 11, 2013, I used the phrase "PIN number"; my friend Arminta (a banker!) corrected my usage because that would be, literally, "PERSONAL IDENTIFICATION NUMBER number". She was glad I didn't make the grievous mistake of writing "ATM machine" as that would be "AUTOMATIC TELLER MACHINE machine"!
Les said, "Have you checked your VEHICLE IDENTIFICATION NUMBER number?"
There is actually a description for people suffering from RAS SYNDROME (REDUNDANT ACRONYM SYNDROME syndrome) or RAP SYNDROME (REDUNDANT ACRONYM PHRASE SYNDROME syndrome).
Les suggested: PNS SYNDROME for PIN NUMBER SYNDROME syndrome!
Among other pleonastic mistakes are: