Ethos generally refers to a culture's guiding ideals. Ethos may also refer to: E-Theses Online Service (EThOS), a service of the British Library Environmental and Thermal operating systems (ETHOS) Flight Controller, for the International Space Station Ethos, a mode of persuasion which appeals to the authority or honesty of a speaker Ethos (film), 2011 documentary film hosted by Woody Harrelson Ethos (journal) official journal of the Society for Psychological Anthropology (1973–present) Ethos (magazine), a biannual UK magazine (2007–14) Ethos (TV series), 2020 Turkish thriller drama web television series Ethos Books, an independent Singapore-based publisher Ethos Water, a brand of bottled water owned by Starbucks EthosCE, a learning system