Search options are numerous:
Natural language and Boolean logic (AND, OR, NOT) can be used in both Basic and Advanced Search.
Advanced Search field options:
Command Line, Field Codes, and Search Tips
Additional Search options (browseable):
Company/Organization (e.g., CIA, NSA, Communist Party (Vietnam), etc.)
Classification (e.g., Secret, Top Secret, Declassified, etc.)
Subject Heading (e.g., covert operations, drug interdiction, airborne military forces, etc.)
Person (e.g., Nixon, Richard M., Amin, Idi, Khrushchev, Nikita S., etc.)
DNSA Record Type (e.g., Bibliographies, Documents, Glossaries, etc.)
Document Type (e.g., Affadavit, Arrest Warrant, Peace Proposal, Policy Paper, etc.)
DNSA Collection (e.g., Berlin Crisis, Cuban Missile Crisis, Iran-Contra Affair, Kissinger Transcripts 1968-1977, etc..)