noun: (Internet) Initialism of Rich Site Summary / Really Simple Syndication (“mechanism to follow updates on other websites such as news, music, blogs, etc.”).
noun: (Internet, deprecated) Initialism of RDF Site Summary.
noun: (military, nautical, Singapore) Initialism of Republic of Singapore Ship (“prefix of Navy ships belonging to the Republic of Singapore Navy”).
noun: (aerospace) Initialism of reusable spaceship.
noun: (astronautics) Initialism of range safety system.
noun: (statistics) Initialism of residual sum of squares. [(statistics) the sum of the squared residuals between some model and a dataset; a measure of how well the model fits with the data]
