RSE may refer to: Ramtha's School of Enlightenment, a spiritual school in the United States Realistic Sound Engine, a sound output format in Guitar Pro Red Seal Endorsement, post-nominal letters signifying attainment of Canada's official journeyperson certification in the trades Relationship and Sex Education, an education curriculum in United Kingdom schools Red Storm Entertainment, a video game company Refractory status epilepticus, the persistent form of status epilepticus despite intervention Relative standard error, a measure of a statistical estimate's reliability Rensselaer Society of Engineers, a local fraternity at Rensselaer Polytechnic Institute, state of New York Research software engineering, the use of software engineering practices in research Rhein-Sieg-Eisenbahn, a German railway company the IATA airport code of Rose Bay Water Airport, a water airport located in the suburb of Rose Bay in Sydney, Australia Royal Society of Edinburgh, Scotland's national academy of science and letters Rwanda Stock Exchange, a stock exchange in Rwanda Pokémon Ruby and Sapphire and Pokémon Emerald, the three main titles of the third generation of the Pokémon series See also the Rosenberg self-esteem scale (RSES) RSE Kriens (missile), a Swiss-developed air defence missile Békéscsabai RSE, a Hungarian women's volleyball club the Odakyu 20000 series RSE, an electric multiple unit (EMU) train type in Japan