Somalia, ISO 3166-1 alpha-2 country code

Standard Oil (1870-1911), a predominant integrated oil producing, transporting, refining, and marketing company; dissolved by the US Supreme Court

Special ops, another name for special forces

.so, a filename extension for "shared object" dynamic library files in Unix

Symphony orchestra, a type of orchestra

SO - Sierra Oscar, the call sign used by police officers in ITV serial drama The Bill.

Special orthogonal group, a subset of an orthogonal group

Science Olympiad, a primarily American elementary, middle school, or high school team competition that requires knowledge of various science topics and engineering ability

SO(4), in mathematics, the group of rotations about a fixed point in four-dimensional Euclidean space

SO19 The Specialist Firearms Command of Scotland Yard, now known as CO19

So (album), a music album by Peter Gabriel

Star Ocean, a role-playing game series by Enix

Special Olympics, an international organization created to help people with intellectual disabilities develop self-confidence and social skills through sports training and competition

Somali language, (ISO 639)

StarOffice, a commercial package of office software produced by Sun Microsystems

.so, the top-level Internet domain of Somalia

Sulfur monoxide, a compound with the chemical formula SO

Sao civilisation or So, an African civilisation that flourished from ca. the 6th century to ca. 15th century

Canton of Solothurn, Switzerland

SO(10) (physics), in particle physics, one of the grand unified theories (GUT) is based on the SO(10) Lie group

Esso, an international trade name used by the Exxon Mobil Corporation and its related companies

Service cable/cord, Oil-resistant, a type of power cord

Southern Company, stock ticker symbol

Sosoliso Airlines, IATA airline designator

So is a common conjunction and adverb. SO or S-o is a common acronym used to indicate Significant other. SO (and variations) may refer to:

Sales order, an order received by a business from a customer

SO, SO alias for SOIC chip "package"

SO(8), in mathematics, the special orthogonal group acting on eight-dimensional Euclidean space

Superior Aviation, IATA airline designator

So (band), a duo from the 80s formed by two members of The Opposition

So (kana), the romanisation of the Japanese kana そ and ソ

SO(5), in mathematics, the special orthogonal group of degree 5 over the field R of real numbers

Shift Out, an ASCII control character in computing

SO10, former Specialist Operations designation for the Metropolitan Police's Crime Operations Group

So and so, disambiguation page

SO11 or Specialist Operations - Intelligence, a defunct branch of Scotland Yard