PQ

PQ is the following:

In Canadian politics, PQ is the Parti Québécois, a political party that advocates national sovereignty for Quebec from Canada.
PQ is a former abbreviation for "Province of Quebec" or Province de Québec, now replaced as a postal abbreviation by "QC."
In biochemistry, PQ is plastoquinone, a molecule used in the electron transport chain in the light-dependent reactions of photosynthesis.
PQ is a short-term for Page Quality - a ranking system where visitors review sites by casting votes.
PQ is also used in Games as [Party Quest]