“It’s S-P-E-W. Stands for the Society for the Promotion of Elfish Welfare ... I was going to put Stop the Outrageous Abuse of Our Fellow Magical Creatures and Campaign for a Change in Their Legal Status - but it wouldn’t fit. So that’s the heading of our manifesto.”
-- Hermione Granger (GF14)
Hermione is outraged by the treatment of house-elves in the Wizarding World, so she starts an organization called the Society for the Promotion of Elfish Welfare or S.P.E.W. It doesn’t exactly catch on with her classmates.