- Archival materials (22)
- Collection descriptions (22)
- Photographs (19)
- Correspondence (16)
- Publications (13)
- Diaries (7)
- Maps (5)
- Manuscripts (4)
- Clippings (3)
- Drawings (3)
- Reports (3)
- Scrapbooks (3)
- Financial records (2)
- Logs (records) (2)
- Notebooks (2)
- Audiocassettes (1)
- Audiotapes (1)
- Booklets (1)
- Motion pictures (visual works) (1)
- Newsletters (1)
- Newspaper clippings (1)
- Photographic prints (1)
- Posters (1)
- Telegrams (1)
- Videotapes (1)
- Aeronautics (21)
- Aeronautics, Commercial (11)
- World War, 1914-1918 (7)
- Air pilots (4)
- Works of art (4)
- World War, 1939-1945 (4)
- Airships (3)
- Balloons (3)
- Aerial reconnaissance (2)
- Airplanes (2)
- Photographic reconnaissance systems (2)
- Aeroanutics (1)
- Aeronautical instruments (1)
- Aeronautics and state (1)
- Aircraft carriers (1)
- Ambulances (1)
- Avionics (1)
- Cold War (1)
- Fighter pilots (1)
- Flight training (1)
- Gliding and soaring (1)
- Harmon International Trophy (1)
- Helicopters (1)
- Kellet XO-60 Autogiro (1)
- Kellet XO-61 Autogiro (1)
- Kites (1)
- Lockheed P-47 (1)
- Lockheed U-2 Family (1)
- Military (1)
- Military intelligence (1)
- Navigation (Aeronautics) (1)
- Omnirange system (1)
- Radar (1)
- Radio (1)
- Radio in aeronautics (1)
- Rohrbach Ro III Rotri Flying Boat (1)
- SPAD XIII (S.13) "Smith IV" (1)
- Sikorsky (USA) R-4 (H-4) Family (1)
- Sikorsky (USA) R-6 (H-6) Family (1)
- Sikorsky (USA) VS-300 Family (1)
- Sikorsky (USA) XR-4 (1)
- Sikorsky (USA) XR-5 (1)
- Sikorsky (USA) XR-6 (1)
- Sikorsky (USA) XR-6A (1)
- Sperry flight ray system (1)
- United States (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.