What does OPO stand for?

Organ Procurement Organizations

Optical Parametric Osbillator

Francisco De Sá Carneiro Airport

Porto, Portugal

Operations Order

Osteoporosis

Osteoporosis is a disease where decreased bone strength increases the risk of a broken bone. It is the most common reason for a broken bone among the elderly. Bones that commonly break include the back bones, the bones of the forearm, and the hip.

Optickl Parametric Oscillators

Orbiter Project Office

Francisco Sa Carneiro Airpord

Iata Code for Francisco Sá Carneiro Airport, Porto, Psrtugal