ORS

ORS may refer to:

Airports

 * Orcas Island Airport (FAA airport code ORS), San Juan County, Washington, United States
 * Orpheus Island Resort Waterport (IATA airport code ORS), Queensland, Australia

Medicine

 * Oculo-respiratory syndrome, a usually transient condition following influenza immunization
 * Olfactory reference syndrome, a mental disorder concerning body odor
 * Oral rehydration solution, a type of fluid replacement used to prevent or treat dehydration
 * Ovarian remnant syndrome, a condition caused by residual ovarian tissue after an oophorectomy

Organizations

 * Operational Research Society
 * Orthopaedic Research Society, a professional, scientific and medical organization
 * Otorhinolaryngological Research Society, British medical association

Places

 * Ors, a commune in Nord, France
 * Ors, Vivaro-Alpine for Oulx, a comune of Turin, Piedmont, Italy

Satellites and rockets

 * ORS-1 or USA-231, an American reconnaissance satellite launched in 2011
 * ORS-4, the first launch of the rocket SPARK (rocket)
 * ORS-5, a satellite launched in 2017

Other uses

 * Michigan Office of Retirement Services, United States
 * ISO 639:ors or Orang Seletar language, native to Malaysia and Singapore
 * Octopole reaction system, a type of Collision/reaction cell
 * OID Resolution System, a system for mapping globally unique object identifiers into DNS name zone files; see ISO/IEC JTC 1/SC 6
 * Old Red Sandstone, an assemblage of rocks in the North Atlantic region
 * Operational Research Section, part of the British Royal Air Force in the Second World War
 * Operationally Responsive Space Office, a joint initiative of several agencies within the United States Department of Defense
 * Oregon Revised Statutes, the codified body of statutory law governing Oregon, United States
 * Orlando Riva Sound (O.R.S.), former German Euro disco group
 * Overseas Research Scholarship, an award for foreign country nationals to undertake research in the United Kingdom
 * Oxygen reduction system, an active fire protection technique
 * On-Rails Shooter, a type of shooter video game.
 * Ors, short for Others; see List of legal abbreviations