The API for OSA is called Parlay, (or Parlay/OSA or OSA/Parlay) as the APIs are developed jointly in collaboration by 3GPP, ETSI, and the Parlay Group.
Parlay Entertainment, Canadian-based developer of online bingo software
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Parlay X, a set of standard Web service APIs for the telephone network
In general Parlay X provides an abstraction of functionality exposed by the more complex, but functionally richer Parlay APIs.
Parlay, Parlay X Standards concerning integration of network elements, operations support systems and business support systems
An OSA Service Capability Server acts as a secure gateway between the IMS network and an application which runs upon the Open Services Architecture (this is typically a SIP to Parlay gateway)
J R tells the story of the eponymous J R Vansant, an 11-year-old schoolboy who obscures his identity through payphone calls and postal money orders in order to parlay penny stock holdings into a fortune on paper.
At Three Ring, he helped parlay Elliott Yamin's (American Idol) appearance into the highest chart debut by a new artist on an independent label in Soundscan history.
It was developed by The Parlay Group, which worked closely with ETSI and 3GPP, which all co-publish it.