The NTRS-R (NASA Technical Reports Server Registered) contains:
- The complete STI collection of NASA and non-NASA aerospace materials and is available by registration only to U.S. Government civil servants, contractors, and grantees
- Over 4.3 million metadata records
- Over 500K full-text PDF images
- Saved search capabilities
U.S. Civil Service, Contractors, and Grantees may fill out the NTRS-R Registration form for access to the complete collection of NASA STI.