Southeast Asia

The Seattle Mariners, a Major League Baseball team

The Seattle Supersonics, a National Basketball Association team

The Seattle Seahawks, a National Football League team

Soluble Egg Antigen

Strategic Environmental Assessment

Scientists and Engineers for America, a pro-science political advocacy group.

System Enhancement Associates, the makers of the Arc file archiver.

State education agency

Single European Act

Socialist Environmental Alliance, a minor political party in Northern Ireland.

Statistical Energy Analysis

Schoof-Elkies-Atkin algorithm

Société d'Etudes Aéronautiques, the same name given to two different aircraft manufacturers, one French, one Belgian.

Southern Economic Association

Svensk Elektrobil AB

Seattle-Tacoma International Airport (IATA: SEA, ICAO: KSEA)

See also: Sea and seas