STO may refer to:
==Businesses and organizations== === Government === NATO Science and Technology Organization Service du travail obligatoire, French men & women between certain ages deported to Germany during WWII to work as slave labour Sojourner Truth Organization, a defunct American leftist group Sovet Truda i Oborony (Совет труда и обороны): Council of Labor and Defense, a Soviet central planning agency of the 1920s United States Air Force Special Tactics Officer
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).