Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Query processing using lookup tables. When a user submits a query from a Web browser, precalculated lookup tables are used to identify a list of accession numbers that match the search criteria. These accession numbers are sorted and merged with the additional information shown in italics, and the results are displayed in a Web browser window.
