SSN

SSN is a three-letter abbreviation which may refer to:

*Secure Service Network, a network behind a firewall or IPS containing systems which can be accessed from both the internal and external networks, but cannot reach the internal network
*Servizio Sanitario Nazionale, Italy's national health service
*Setanta Sports News, a 24-hour sports news network in the United Kingdom
*SIM Serial Number, used to identify a mobile phone's SIM card
*Simultaneous Switching Noise, In Digital Electronics: an important aspect of power and signal integrity
*Sky Sports News, a 24-hour sports news network in the United Kingdom
*Social Security number, an identification number used by the U.S. Social Security Administration.
*Socialist Solidarity Network, a Trotskyist group in the UK
*Species Survival Network: a coalition of conservation organizations committed to the enforcement and enhancement of CITES, the Convention on International Trade in Endangered Species
*SSN (hull classification symbol), the United States Navy's hull classification symbol meaning "fast attack submarine," one that is propelled by nuclear energy
*"Tom Clancy's SSN", a 1996 game by Clancy Interactive Entertainment describing the operations of a U.S. Navy attack submarine
*SSN (novel), a 1996 novel by Tom Clancy based upon the game by the same name
*SSN College of Engineering, an engineering institution located in the suburbs of Chennai, Tamil Nadu, India
*Subsystem number, used in the Signaling Connection and Control Part of Signaling System #7 routing
* Surgical Segment Navigator, a system for computer-assisted surgery
* The IATA code for Seoul Airbase

ee also

* SN
* SS (disambiguation)