In 1998, Tab Limited was granted an exclusive licence for a period of fifteen years by the New South Wales (NSW) Government to operate a Centralised Monitoring System (CMS) on all gaming machines in clubs and hotels (venues) throughout the state.
In 1999, Tab Limited created the division of DMS to develop the CMS, and ensure the integrity and security of the data collected.
In 2004, Tab Limited was acquired by TabCorp Holdings Limited. On 1 January 2005, TabCorp Holdings Limited divested the gaming division of Tab Limited to UNiTAB Limited. The company, Maxgaming NSW Pty Ltd, was established by UNiTAB Limited and DMS became a division of this entity.
In Oct 2006, UNiTAB Limited became part of Tattersall's Limited as a result of a merger of both companies.
The CMS provides a daily data stream of information from all gaming machines across the state to a central host computer.