
Twelfth-century CODE of chivalry?
Not exactly current.
The Big Bang Theory Season 1, Episode 17

That's CODE, Leonard.
The Big Bang Theory Season 8, Episode 19

but the CODE is different,
the language--
Westworld Season 2, Episode 4

U.S. CODE, title 1 5, chapter 53--
Breaking Bad Season 4, Episode 3

That's our CODE word.
The Big Bang Theory Season 11, Episode 12