PPB

PPB can stand for:


 * Production possibility boundary, a concept in economics
 * Parts per billion, describing small values of miscellaneous dimensionless quantities
 * Portland Police Bureau, in Portland, Oregon, U.S.
 * Partido Progressista Brasileiro, former name of Progressive Party of Brazil
 * Pleuropulmonary blastoma, a type of lung cancer
 * PPB Group, a Malaysian company