I listen to the Fulton County Public Safety P25 very often which includes a lot of departments. They use codes such as signal-34, signal-89 I know that they use codes to A. Be obscure so no one can understand, B. Be more efficient while speaking on the radio. But is there a database or list anywhere where I can find these police codes these departments use? Is there some sort of standard amongst all police departments or are they all unique and there is no way to decipher them?