Etiquette
Etymology
From French étiquette "label, ticket," originally a small card listing the ceremonial rules and order of precedence at the French court, from Old French estiquier "to attach, stick." The same word gave English "ticket." Court protocol was literally handed out on a note — hence the rules became "the etiquette."
noun · /ET-ih-kit/
The set of conventional rules governing polite behavior in a society or group.
What it names
A handle for the codified, learnable rulebook of good conduct — the specific do’s and don’ts, as opposed to the underlying spirit of consideration.
Example
Business etiquette in one country demands a firm handshake; in another it reads as aggression.
Related idea
Distinct from manners: etiquette is the external, arbitrary code (which fork, when to bow) that varies by culture and can be looked up, while manners are the deeper disposition to make others comfortable. You can have flawless etiquette and bad manners — technically correct, yet cold.