Spontaneous abortion Sustained action, a longer-acting form of a medication Surface area Sense of agency Computing and telecommunications .sa, the country code top level domain (ccTLD) for Saudi Arabia Security association in the IPsec networking protocol Selective availability, a mechanism for degrading the precision of the civilian GPS network Simulated annealing, an optimisation technique Software architect Software architecture Microsoft Software Assurance Structured analysis, a software engineering technique Suffix Array System administrator System architecture Systems analysis Systems analyst Other uses in science, technology, and mathematics Sa (Islamic measure), Arabic measure of volume Samarium (former chemical symbol: Sa), a rare earth metal Single action, a type of firearm trigger Situation awareness, a component of aviation safety and other socio-technical systems Spectral acceleration, in seismology and earthquake engineering Superabundant number, a type of number (mathematical concept) Unbarred spiral galaxy Short axis, in single-photon emission computed tomography Surface area Other uses Sa (Mandaeism), a type of Mandaean sacramental bread that is rolled up Seaman apprentice, a U.S. Navy and Coast Guard rank Secrecy agreement, a legal contract for confidentiality Sex appeal, attraction on the basis of sexual desire Sexual assault, the intentional act of sexually touching another person without their consent Share-alike, a term used in Creative Commons licensing Second Amendment to the constitutions of several sovereign states and subnational entities Second Amendment to the United States Constitution, the most common reference to "Second Amendment" Sextina Aquafina Single adult (LDS Church), a designation in The Church of Jesus Christ of Latter-day Saints for unmarried individuals 18 and older; sometimes used specifically to refer to unmarried individuals over 30 Special agent, a position usually held by investigative officers within certain law enforcement agencies in the United States sub anno, the year under which events are recorded in chronicles San Andreas (disambiguation) See also Sá, a Portuguese surname Sa (萨), a rare Chinese surname of Semu origin (see 雁门萨氏) Semi-automatic (disambiguation)