(Internet) Initialism of Rich Site Summary / Really Simple Syndication (“mechanism to follow updates on other websites such as news, music, blogs, etc.”).

(aerospace) Initialism of reusable spaceship. / (astronautics) Initialism of range safety system. / (statistics) Initialism of residual sum of squares.

plural of RSS

(Internet) An XML document that follows the RSS ("Rich Site Summary") specification, used for syndication.

plural of RSS feed

Initialism of received signal strength indicate. A measure of the energy observed by an antenna when receiving a signal.