Orsa
Orsa stands for:
- Orsa (Arabia) , in ancient geography a mountain in Arabia (Plin. 6,32)
- Orsa (municipality) , a municipality in Sweden
- Orsa (Sweden) , capital of the municipality of the same name in Sweden
- Orsa-class , a class of torpedo boats used by the Italian Navy
ORSA is an abbreviation for:
- Officine Realizzazioni Sarde Automobili , a former car manufacturer based in Sardinia
- Orbit Reconstruction, Simulation and Analysis , a free software project, see also Orbit @ home
- Own Risk and Solvency Assessment , an instrument of the governance and risk management system of insurance companies
- Oxacillin-Resistant Staphylococcus Aureus , a special strain of bacteria, see Staphylococcus aureus # Multi-resistance
- Operations Research Society of America, now Institute for Operations Research and the Management Sciences
