Geographical Location - United States
- 6.6 Million Women Enter the U.S. Labor Force
- Activism
- Adobe
- Adoption
- African American-American Indian relations
- Agriculture
- Alcoholism
- Algonquian language family
- Amahl and the Night Visitors Premieres on American Television
- American Civil War
- American Firms Adopt Japanese Manufacturing Techniques
- American Indian Defense Association
- American Indian Higher Education Consortium
- American Indian Policy Review Commission
- American Indian Religious Freedom Act
- American Indian Studies
- American Indian wars
- American Revolution
- American Science Fiction Enjoys Its Golden Age
- American Scientists Campaign Against Nuclear Testing
- Apollo 11 Lands on the Moon
- Apollo-Soyuz Rendezvous Inaugurates International Cooperation in Space
- Appliqué and Ribbonwork
- Arab Members of OPEC Institute an Oil Embargo
- Arab Oil Embargo and Energy Crisis
- Arab Oil Embargo Precipitates Energy Crisis
- Architecture: Arctic
- Architecture: Northeast
- Architecture: Plateau
- Architecture: Southeast
- Ardrey’s The Territorial Imperative Argues That Humans Are Naturally Territorial
- Arnold and Gottlieb Publish The Wise Use Agenda
- Art and Artists: Contemporary
- Artificial Fluoridation of Municipal Water Supplies to Prevent Dental Decay Is Introduced
- Arts and Crafts: Plains
- Arts and Crafts: Plateau
- Arts and Crafts: Southeast
- Asian Pacific American Labor Alliance
- Astronauts Renovate Hubble Telescope
- Astronauts Repair the Hubble Space Telescope
- Astronomers Discover the Rings of the Planet Uranus
- Astronomers See Light from Object 12.2 Billion Light-Years Away
- Astronomy
- AT&T Divestiture Takes Effect
- Athapaskan language family
- Atlatl
- Automakers Introduce the Catalytic Converter
- Aviator Earhart Disappears in Flight over South Pacific
- Bacon Designs First Fuel Cell
- The Bald Eagle Is Removed from the Endangered Species List
