SAP

The Session Announcement Protocol (SAP) is a protocol for broadcasting multicast session information.

A SAP listening application can listen to the well-known SAP multicast address and construct a guide of all advertised multicast sessions. SAP was published by the IETF as RFC 2974 (http://www.ietf.org/rfc/rfc2974.txt).

SAP typically uses SDP as the format of the session descriptions, and the multicast sessions typically use RTP.

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SAP (http://www.sap.com) is also the name of a German software giant. Their products are in the ERP business sector.

You can find more info about the company and it's main product under SAP R/3

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SAP also stands for "secondary audio programming", an auxiliary sound channel for television which can be broadcast or transmitted by cable. It is often used for an alternative language.