- Aeronautics (12)
- Air pilots (9)
- World War, 1914-1918 (6)
- Aeronautics, Commercial (5)
- Flight training (3)
- Periodicals (3)
- Aerial reconnaissance (1)
- Aircraft industry (1)
- Airlines (1)
- Airships (1)
- Albatros D.Va (L24) (1)
- Balloons (1)
- Burgess Aircraft Family (1)
- Burgess-Wright Aircraft Family (1)
- Caproni Ca.3 (1)
- Curtiss JN-4 Jenny Family (1)
- Curtiss Model H "America" (H-1) (1)
- Curtiss NC-1 (P2N-1) (1)
- Curtiss NC-4 (P2N-1) (1)
- Curtiss NC-Boat Family (1)
- Douglas World Cruiser (DWC) (1)
- Endurance flights (1)
- Flights around the world (1)
- Gliding and soaring (1)
- Kites (1)
- Langley Aerodrome A, Curtiss 1914 Rebuild (1)
- Photographic reconnaissance systems (1)
- Seaplanes (1)
- Transatlantic flights (1)
- Works of art (1)
- World War, 1939-1945 (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.