license plates and making up acronyms

United States
March 30, 2008 2:31pm CST
license plate, vanity plate - License plate of medical personel perhaps.
Do you ever make up acronyms for the random letters on the vehicles license plate as you sit behind them at a light or in a traffic jam? I have often wondered if I do this just because I am a nurse and we have so many abbreviations in the medical field or if alot of other people do the same thing. Thanks for reading and responding.