ystem tatus anagement. A method of managing emergency unit resources to ensure the quickest possible response to any incident. Units are located according to call volume and incidence of calls in each geographical Post, and staffing is based on the number of calls that usually come in during a given time period.

See storage manager.

Midget submarine

Source-specific multicast. A service that allows a client to receive multicast traffic directly from the source. Typically, SSM uses a subset of the PIM sparse-mode functionality along with a subset of IGMPv3 to create a shortest-path tree between the client and the source, but builds the shortest-path tree without the help of a rendezvous point.

RealPlay Standard Streming Metafile

Sport Study Model

A spatially detailed multi-modal model for Southampton

System Status Matrix

Synchronous Status Messaging

Sync Status Messaging. A SONET protocol that communicates information about the quality of the timing source using the S1 byte of the line overhead.

Surface-to-Surface Missile.

Special Safeguard Mechanism

Support Systems Module

Special Study Module

Semi-Solid Material

SSM can be an abbreviation for