What does OPV stand for?

Bedarfsflugunternehmen Dr. L. Polsterer - Austria - ICAO designator (FAAC)

Observation Post Vehicle (SAUS)

Offshore Patrol Vessel (DOMA)

Ohms per Volt

Optical Path-Length Variation (PDAA)

Optionally Piloted Vehicle (SAUS)

Oral Polio Vaccine - Also, Sabin vaccine (PAZ)

Oral Poliovirus - Infectious diseases (DAVI)

Oral Polio Virus Vaccine

Oral poliovirus vaccine (CDC)

Organic PhotoVoltaic (SAUS)