This excerpt taken from the NYX 10-K filed May 1, 2007.
Securities Industry Automation Corporation (SIAC)
SIAC, a wholly owned subsidiary of NYSE Group, provides data processing and software development services and is a registered securities information processor under the Exchange Act. Formed in 1972 as a New York business corporation, SIAC:
Historically, SIAC has been operated as a cost-recovery utility. As a result, it provides its services to its customers on an at-cost, non-profit basis.
SIACs wholly owned for-profit subsidiary, Sector, Inc., offers an array of communications and data processing services, primarily to the broker-dealer community. These services include email archiving, other books and record storage solutions, facilities management, data center hosting, disaster recovery, enterprise services and network and data distribution services. The telecommunications services include traditional point-to-point voice circuits and network management.
In addition, TransactTools, which was acquired in January 2007, provides enterprise messaging solutions for the security trading industry.
SIAC provides data processing services to the NYSE. In addition, SIAC operates the Intermarket Trading Systems and provides services to the Intermarket Surveillance Group Participants, the CTA Plan and CQ Plan and the Options Price Reporting Authority. SIAC also provides services to Sector and the American Stock Exchange pursuant to separate agreements.