Police 10-codes came about due to a need for brevity and comprehension on cluttered radio bands and were quickly adopted elsewhere.

All cultures and professions have their own unique phrasings and jargon. Here's why police and truckers speak that way on the radio.

Chances are, you’ve heard of the police code 10-4, which means “affirmative” or an acknowledgment of a message. But if you hear a police officer say 10-33, there’s a police emergency ...

Police, fire, trucking, and some military dispatchers - including these from the Houston Police Department - use 10-codes in their work every day.

Virginia police are phasing out the use of radio codes, including 10-4 and other well-known phrases.

Have you ever heard someone, possibly a police officer, respond by saying “10-4?” What does that mean and where did it come from?

Another great American tradition, part of the lore and legend of the road, slid further toward oblivion last week. The Maryland State Police abandoned the terse “ten code” system of radio ...