SRL or S.R.L. may refer to: a designation equivalent to limited liability company, that may be appended to the end of company names: Società a responsabilità limitata (Italian) Sociedad de responsabilidad limitada (Spanish) Societate cu răspundere limitată (Romanian) Société à Responsabilité Limitée (French) Semantic role labeling, an activity of natural language processing Sarcalumenin, human protein that regulates calcium transport Shift register lookup table, a component in digital circuitry Student Rugby League, UK Semiconductor ring laser, a type of laser Statistical relational learning, a subdiscipline of artificial intelligence Suburban Rail Loop, a proposed rail line in Melbourne, Australia Survival Research Laboratories, a machine performance art group Self-regulated learning, a psychological concept related to metacognition (see Irish orthography#Abbreviations) Stimulated Raman Loss, a sub-type of Stimulated Raman spectroscopy Palo Verde Airport IATA code