There are currently six EXPRESS facilities installed on Space Station. Each of these can accommodate ten (10) standard-sized small experiments, supplying them with power conversion and distribution, data and video distribution, nitrogen supply and exhaust distribution, and thermal control interfaces. The EXPRESS Rack concept provides the capability for a simple and shortened integration template.
Approximately 50% of the EXPRESS payload accommodation capability (~ 30 payload locations) is available for International Space Station’s U.S. National Laboratory usage.
EXPRESS Facilities 1 and 2 launched April 19, 2001;
EXPRESS Facilities 4 and 5 launched August 10, 2001;
EXPRESS Facility 3 launched June 5, 2002;
EXPRESS Facility 6 launched November 14, 2008.
EXPRESS Facility 7 will launch March 2010.
EXPRESS Facility 6 will launch September 2010.