TRAIL - Technical Report Archive and Image Library
Access to over 57,000+ federal technical reports.
OSTI Department of Energy - Office of Scientific and Technical Information
Index of Department of Energy Technical Reports from 1994 to date.
Gateway to over 50 million pages of authoritative selected science information provided by US government agencies, including research and development results.
Includes national-level science portals for countries from around the world.
NASA Technical Reports Server
Index to various NASA databases searchable by keywords.
NTIS - National Technical Information Service
Search over 400,000 scientific and technical document titles for sale.
DTIC - Defense Technical Information Center
Search more than 1 million final reports on Defense funded research, development, test and evaluation activities.