PMO

• Polish Military Organisation, an intelligence and sabotage group during World War I
• Prime Minister's Office (disambiguation), government departments in several countries
• Principal Medical Officer, a senior position
• Priority Material Office, a logistics support command of the United States Navy

• Periodic mesoporous organosilica, a type of silica containing organic groups
• Phosphorodiamidate morpholino oligo, a type of molecule in molecular biology
• Planetary-mass object, a celestial object of size similar to a planet
• Prosopometamorphopsia, visual disorder

• Falcone Borsellino Airport (IATA Airport Code), Italy
• Pine Mountain Observatory, an astronomical observatory in Oregon, US
• Project management office, a standards group within an organisation

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