(Internet) Initialism of social networking site. / (neuroanatomy) Initialism of sympathetic nervous system.

(Internet) Abbreviation of screenname.

Initialism of screen name. / Initialism of social network. / Initialism of social networking. / (chemistry) Initialism of steric number. / (neuroanatomy) Initialism of substantia nigra.

(computing) Initialism of shared-nothing.

(astronomy) Abbreviation of supernova.

Abbreviation of Sunday.

(programming) Initialism of MQ Telemetry Transport for Sensor Networks (a variation of the MQTT protocol for embedded devices on non-TCP/IP networks.)

Abbreviation of stripped-envelope supernova.

plural of SNS