- Archival materials (25)
- Collection descriptions (25)
- Photographs (12)
- Correspondence (11)
- Publications (9)
- Financial records (8)
- Clippings (6)
- Manuscripts (5)
- Reports (5)
- Motion pictures (visual works) (4)
- Manuals (3)
- Notes (3)
- Audiotapes (2)
- Diaries (2)
- Maps (2)
- Albums (1)
- Articles (1)
- Audiocassettes (1)
- Awards (1)
- Biographies (1)
- Black-and-white negatives (1)
- Blueprints (1)
- Brochures (1)
- Catalogs (1)
- Negatives (1)
- Newsletters (1)
- Pamphlets (1)
- Receipts (1)
- Videotapes (1)
- Aeronautics (24)
- Aeronautics, Military (10)
- Aircraft industry (7)
- Airplanes (6)
- Periodicals (6)
- Flight training (2)
- Patent suits (2)
- Aerial photography (1)
- Aeroanutics (1)
- Aeronautical engineers (1)
- Aeronautical laboratories (1)
- Aeronautical sports (1)
- Aeronautics and state (1)
- Airlines (1)
- Airships (1)
- Astronautics (1)
- Astronautics and state (1)
- Astrophysics (1)
- Autogiros (1)
- Boeing Model S-307 (PAA-307) Stratoliner (1)
- Coanda effect (1)
- Continental Inc Airphibian Family (1)
- Cunningham-Hall GA-21M (1)
- Cunningham-Hall GA-36 (1)
- Cunningham-Hall PT-6 (CHPT-6) (1)
- Cunningham-Hall PT-6F (CHPT-6F) (1)
- Curtiss CD-12 (engine) (1)
- Curtiss R-1454 (engine) (1)
- Curtiss V-1400 (engine) (1)
- Curtiss, General, Aircraft (1)
- Curtiss-Wright aircraft (1)
- Environmental sciences (1)
- Ford Tri-Motor Family (1)
- Gliding and soaring (1)
- Goodyear Pony Blimp (Airship) (1)
- Goodyear Wingfoot Express (Airship) (1)
- Heinkel He 178 (1)
- Heinkel He S3B Turbojet (engine) (1)
- Heinkel He S8 (109-011) Turbojet (engine) (1)
- Helicopters (1)
- Helicopters, Home-built (1)
- Herrick Vertaplane Family (1)
- Herrick rotary engine (1)
- Jet propulsion (1)
- Lawrance J-1 9-cyl radial engine (1)
- Lawrance Model B 3-cyl radial engine (1)
- Monnett Moni (homebuilt) (1)
- North American XB-70A (RS-70) Valkyrie (1)
- North American XB-70A (RS-70) Valkyrie Wind Tunnel Model (1)
- Roma (Italian SCA T.34) (Airship) (1)
- Rotorway RW 133 Scorpion Helicopter (1)
- Supersonic bombers (1)
- Supersonic planes (1)
- Supersonic transport planes (1)
- Vertically rising aircraft (1)
- Waco Aircraft Family (1)
- Waco W Aristocraft (1)
- Wind tunnel models (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.