What is the abbreviation for Police Department?

The abbreviation for Police Department is commonly recognized as "PD." This standard abbreviation is widely used across law enforcement agencies and in various contexts to refer to police departments in both informal and formal communications. The use of "PD" allows for a concise way to identify and refer to police organizations, especially in documentation, reports, and inter-agency communications.

The other options do not represent the standard abbreviation for a police department. "PDQ" typically stands for "Pretty Darn Quick," which is unrelated to law enforcement terminology. "PDB" could refer to a variety of phrases, including "Police Data Base," but is not a recognized abbreviation for Police Department. Meanwhile, "PDEC" does not have any established significance in the context of police departments. Thus, "PD" remains the most accepted and understood abbreviation in this context.