A redundant acronym (ac-re-DUND-uh-nim). Typically an acronym followed by one or more words that are already represented by one or more letters in the acronym.
I created this word sometime in the mid-1990's.
Here are a few acredundanyms:
ATM Machine (Automatic Teller Machine Machine)
PIN Number (Personal Identification Number Number)
ABS Brake System (Antilock Brake System Brake System)