[philipn]

Ranked Choice Voting is sometimes called Instant Runoff Voting when used in a single-winner election. But it can be used in multi-winner elections.

If it's used for a multi-winner election, it gives results that are proportional in representation. For instance, this is how it's used in the city council elections in Cambridge, MA. Sometimes it's referred to as "Single Transferable Vote" when used for multi-winner elections.

"Ranked Choice Voting" is an umbrella term that refers to the ranked ballots, round-by-round elimination of candidates, etc.