Goddard Institute for Space Studies provides access to citations and abstracts of its research publications.

Find unpublished technical papers and reports, or "gray literature," from US govt. agencies. Includes NASA and the depts of Energy and Defense.

Serves as a clearinghouse for NASA documents such as reports, articles, and presentations. Also see FAQs for this collection dating back to 1960.

Selections include applied research in artificial intelligence, communication systems, and advanced information technology.