- Archival materials (15)
- Collection descriptions (15)
- Correspondence (13)
- Photographs (13)
- Publications (10)
- Clippings (6)
- Financial records (6)
- Drawings (5)
- Audiotapes (3)
- Diaries (3)
- Maps (2)
- Motion pictures (visual works) (2)
- Reports (2)
- Scrapbooks (2)
- Videotapes (2)
- Articles (1)
- Audiocassettes (1)
- Biographies (1)
- Business records (1)
- Ephemera (1)
- Logs (records) (1)
- Negatives (1)
- Newsletters (1)
- Pamphlets (1)
- Timetables (1)
- Aeronautics (15)
- Periodicals (8)
- Aeronautics, Military (6)
- Aeronautical engineers (3)
- Air mail service (3)
- Airplanes (3)
- Aircraft industry (2)
- Airports (2)
- Balloons (2)
- Aerial photography (1)
- Aeroanutics (1)
- Aeronautics and state (1)
- African American air pilots (1)
- Air pilots (1)
- Airships (1)
- Beech Aircraft Family (1)
- Continental Inc Airphibian Family (1)
- Curtiss CD-12 (engine) (1)
- Curtiss R-1454 (engine) (1)
- Curtiss V-1400 (engine) (1)
- Flight training (1)
- Gliding and soaring (1)
- Helicopter transportation (1)
- Helicopters (1)
- Kites (1)
- Noise pollution (1)
- Parachutes (1)
- Piper PA-25 Pawnee Family (1)
- Smith (John W.) 1911 Monoplane (1)
- Smith (John W.) 1913 Monoplane (1)
- Works of art (1)
- World War, 1914-1918 (1)
Our collections specialists actively work on the conservation, preservation, restoration, and long-term care of the objects in our collection. From full-scale restoration projects to applying preservation techniques and doing regular assessments, these activities form a crucial part of our stewardship of the National Collection.