- Aeronautics (7)
- Balloons (3)
- Airlines (2)
- Airships (2)
- World War, 1914-1918 (2)
- Aerial photography (1)
- Aeronautics, Commercial (1)
- Aeronautics, Military (1)
- Air travel (1)
- Astronautics (1)
- Astronauts (1)
- Buffalo (Airship) (1)
- Civil War, 1861-1865 (1)
- Curtiss, General, Aircraft (1)
- Ganymede (Airship) (1)
- Great Western (Airship) (1)
- Madame Carlotta (Airship) (1)
- Motorcycles (1)
- Naval aviation (1)
- Phantom Balloons (Airships) (1)
- Radio in aeronautics (1)
- Russo-Japanese War, 1904-1905 (1)
- South African War, 1899-1902 (1)
- Spanish-American War, 1898 (1)
- The Aerial (Airship) (1)
- USS Los Angeles ( ZR-3) (1)
- Works of art (1)
- World War, 1939-1945 (1)
- ZR-1 Shenandoah (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.