PIN stands for "Personal Identification Number". When people say "PIN number", they are saying "Personal Identification Number Number". As with many acronyms, such as the "NAFTA agreement" in which they are saying "North American Free Trade Agreement agreement". I don't know, this just bothers me for some reason. Why can't people use acronyms correctly? They could say "PI Number" or just "PIN" but NOT "PIN number".
-asabour
-asabour