This excerpt taken from the NDAQ 8-K filed Jan 27, 2006.
Note 7. Intangible Assets and Goodwill, Net
Information regarding the Companys intangible assets and goodwill is as follows:
Intangible assets and goodwill arose in connection with the Companys acquisitions of ProTrader in October 2001, Island in September 2002 and Bridge in March 2005 (see Note 3).