“PIN number” is redundant. That’s like saying “Personal identification number number”. Or “ATM machine” is like saying “Automated teller machine machine”. Or “The La Brea Tar Pits” is like saying “the the tar tar pits”.
“PIN number” is redundant. That’s like saying “Personal identification number number”. Or “ATM machine” is like saying “Automated teller machine machine”. Or “The La Brea Tar Pits” is like saying “the the tar tar pits”.