OPO

OPO is an abbreviation for:

• Optically parametric oscillator , optically nonlinear crystal in an optical resonator
• OPO Oeschger AG, a Swiss trading company, based in Kloten
• Ovamboland People's Organization , a historic party in Namibia
• Porto Airport , an international airport in northern Portugal near the city of Porto and the second largest in the country
• Powiat Opolski in Opole Voivodeship, Poland (license plate)
• OnePlus One , the first smartphone from OnePlus

This is a disambiguation page for differentiating between several terms identified with the same word.