… in the Oscars race.  It’s an alternative voting system for nominations (and in a few categories, for the final result):

In the nominations voting, the marking and tabulation of all ballots shall be according to the preferential, weighted average, or reweighted range voting system. Votes for achievements in motion pictures not on the Reminder List will not be counted in the nominations balloting. Tabulation of final ballots shall be according to the plurality or preferential system. No “write-in” votes shall be counted on the final ballot.

There’s a good explanation here using last year’s Best Actress contenders, and FairVote (among others) will periodically put out explanations of its own.