MWO
MWO may refer to: Master warrant officer, a military rank in the Canadian Forces Max Watts Out, a non-standard unit of power rating, aka Units Watts Out (UWO) MechWarrior Online, a vehicular combat video game Media Whores Online, a defunct left-wing blog Meyer–Womble Observatory, an astronomical observatory near Mount Evans, Colorado, USA Middletown Regional Airport, Militaire Willems-Orde (Military Order of William), a Netherlands chivalric order Mount Washington Observatory, a scientific and educational institution with a weather observation station at Mount Washington in New Hampshire Mount Wilson Observatory, an astronomical observatory in Los Angeles County, California, USA