Where the gosh darn did that 10-4 come from? APCO codes.

10codeschart

In honor of Monday, which happens to be October 4, I provide a simple explanation of the common expression “10-4,” which means “OK.”

It comes from the Association of Public Safety Communications Officials International (APCO) which devised these “10-codes” in 1937 for brevity and standardization of CB and other radio message traffic. Their most popular use is probably law enforcement, though in recent years governments have recommended their discontinuation in favor of boring, everyday language.

I don’t know about that. I think I’ll start using “10-17” instead of “I’m on my way” and “10-22” instead of “never mind.” You know, it could just catch on.

10-15, y’all.

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~ by jimarnoldla on October 4, 2010.

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