Virtual Technical Reports Center
http://lib.umd.edu/ENGI/TechReports/
Virtual-TechReports.html

Defense Technical Information Center (DTIC)
http://www.dtic.mil/dtic/

DOE (Dept. of Energy) Energy Citations Database
http://www.osti.gov/energycitations/

DOE (Dept. of Energy) Information Bridge (full-text technical reports)
http://www.osti.gov/bridge/

DOE (Dept. of Energy) Office of Scientific and Technical Information
http://www.osti.gov/collections.html

EPA Publications
http://www.epa.gov/ncepihom/

NTIS (National Technical Information Service) http://www.ntis.gov/

NASA Technical Reports Server
http://ntrs.nasa.gov/

Los Alamos Technical Reports and Publications
http://www.fas.org/sgp/othergov/doe/lanl/index.html

Electrical Engineering & Computer Science Technical Reports
http://techreports.lib.berkeley.edu/

Indiana University Computer Science Technical Reports Index http://www.cs.indiana.edu/Research/techreports/

Yahoo - Computer Science Technical Reports http://dir.yahoo.com/Science/computer_science/
technical_reports/

Federal Government Technical Reports in Cooper Library
http://www.lib.clemson.edu/GovDocs/DOE.htm