GOS

GOS may refer to:

* Gadolinium oxysulfide, an inorganic compound
* General ophthalmic services, health care services for the eyes
* Geographical Operations System, mapping and database software for telecommunications companies.
* Global Ocean Sampling Expedition, an expedition assessing the genetic diversity in marine microbial communities
* Gloucestershire Old Spots, a rare breed of domestic pig
* gOS (operating system), a lightweight Linux distribution
* Grade of service, a probability used in telecommunications to express the quality of voice service
* Grange-over-Sands railway station, England, National Rail station code GOS
* Grid-oriented storage, a dedicated data storage architecture for grid computers
* Gross operating surplus, the surplus due to owners of incorporated businesses