If barely legible writing on doors and things are canon, when they were never intended to be seen clearly, we have to accept signs that say "Close cover before striking", "Do not remove tag under penalty of law", and "No user serviceable parts inside".
Then there are the dedication plaques.
USS Brattain: "...a three hour tour, a three hour tour."
USS Excelsior, USS Hathaway, and USS Phoenix: "No matter where you go, there you are."
USS Odyssey: "Its origin and purpose, still a total mystery."
USS Sutherland: "There will be an answer, let it be..."
There's also supposed to be a statistic on one of Beverly's overhead medical scanners identified as "Med Ins Rem" for "medical insurance remaining".