This excerpt taken from the NDAQ 10-K filed Mar 14, 2005.
We depend on third party suppliers and service providers for a number of services that are important to our business. An interruption or cessation of an important supply or service by any third party could have a material adverse effect on our business.
We depend on a number of suppliers, such as MCI, Microsoft, Cisco, Hewlett Packard and Dell for elements of our trading, market data and other systems, as well as communications and networking equipment, computer hardware and software and related support and maintenance. We cannot assure you that any of these providers will be able to continue to provide these services in an efficient, cost-effective manner or that they will be able to adequately expand their services to meet our needs. An interruption in or the cessation of an important supply or service by any third party and our inability to make alternative arrangements in a timely manner, or at all, could result in lost revenues and higher costs and adversely affect our business, financial condition and operating results.