RAS syndrome, where RAS stands for redundant acronym syndrome (making the phrase "RAS syndrome" autological) is the redundant use of one or more of the words that make up an acronym in conjunction with the abbreviated form. This means, in effect, repeating one or more words from the acronym. For example: PIN number (expanding to personal identification number number) and ATM machine (expanding to automated teller machine machine).
The term RAS syndrome was coined in 2001 in a light-hearted c...
