RBO

RBO or Rbo may refer to:
 * Rock et Belles Oreilles, a Québécois radio, television and stage comedy group
 * MTA Regional Bus Operations, the surface transit division of New York's Metropolitan Transportation Authority
 * Ragnarok Battle Offline, a computer game
 * Reliability-based optimization, a Multidisciplinary design optimization method
 * Rubidium oxide, the chemical compound Rb2O
 * Robert Brownlee Observatory in Lake Arrowhead, California
 * Rule Based Optimization, an SQL Query plan optimization technique
 * Red Buttes Observatory near Laramie, Wyoming
 * Rang Badalti Odhani
 * Rank-biased overlap used in Ranking information