ACEO may refer to: ACEO (brand), a brand name for the NSAID medication Acemetacin AC Electro-osmosis, a methodology for Optoelectrofluidics Art Cards, Editions and Originals, the Artist trading cards Association of Caribbean Electoral Organizations, a component of the International Foundation for Electoral Systems Advisory Committee for Earth Observation, a department of the European Space Agency's Mission Science Division Associação Comercial e Empresarial de Osasco, a leading company located in Osasco, São Paulo, Brazil See also ace (disambiguation) CEO (disambiguation)