REDUNDANCY, PLEONASM, AND TAUTOLOGY

I used the phrase "PIN number" but I was immediately  corrected by my brother Les because that usage would be, literally, "PERSONAL IDENTIFICATION NUMBER number".  I was glad I didn't make the grievous mistake of saying  "ATM machine" as that would be "AUTOMATIC TELLER MACHINE machine"!

Les asked, "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:

HIV virus
SAT test
ACT test
APR rate
UPC code
ABS system
CAD design
AC current
DC current
PC computer
CNN network
ABM missile
DMZ zone
GOP party
LCD display

and my favorite:

AM in the morning!