sTs

STs is an abbreviation that can refer to multiple concepts across different domains. Without context, it can denote technical terms in biology, religion, computing, and linguistics.

In microbiology, Sequence Type (ST) is used in multilocus sequence typing (MLST). An isolate’s alleles at several housekeeping genes are combined to assign a sequence type. STs provide a way to categorize strains and study population structure and transmission. They are widely used to track outbreaks in pathogens such as Staphylococcus aureus and Streptococcus pneumoniae.

In religious and historical usage, Sts. is the plural abbreviation for saints, used in lists and in street or place names (for example, St. Mary). It appears in bibliographic references and archival materials as a conventional shorthand.

In industrial automation, ST stands for Structured Text, a high-level programming language defined by IEC 61131-3. ST is used to write complex control logic for programmable logic controllers, combining readability with the capabilities of conventional programming languages.

In linguistics, ST has been used to denote Standard Theory, an early framework in generative grammar that preceded later developments. The term appears in literature discussing the history of generative theories.