- Memorabilia (567)
- Personal equipment (363)
- Aircraft (358)
- Awards (325)
- Models (251)
- Equipment (232)
- Propulsion systems (212)
- Rockets (185)
- Components (objects) (155)
- Medals (153)
- Photographic equipment (139)
- Insignias (136)
- Works of art (98)
- Uncrewed spacecraft (97)
- Uniforms (88)
- Scientific instruments (87)
- Crewed spacecraft (80)
- Missiles (70)
- Instruments (61)
- Flight instruments (59)
- Protective and life-saving equipment (59)
- Engines (58)
- Headgear (53)
- Helmets (53)
- Reciprocating (piston) engines (50)
- Rotary engines (50)
- Costume accessories (47)
- Engines (power producing equipment) (45)
- Communication systems (mechanical and electrical systems) (41)
- Tools (41)
- Avionics (40)
- Payloads (36)
- Prints (35)
- Originals (34)
- Culinary equipment for serving and consuming food (32)
- Food (32)
- Navigational instruments (32)
- Weapons (32)
- Rotorcraft (29)
- Testing equipment (25)
- Trophies (25)
- Clothing (24)
- Protective wear (24)
- Handwear (23)
- Paintings (20)
- Propellers (20)
- Medical equipment (19)
- Sights (firearm component) (19)
- Footwear (17)
- Personal equipment: grooming, hygiene and health care (17)
- Computers (16)
- Impellers (16)
- Jet aircraft (16)
- Turbines (16)
- Radar (12)
- Artificial satellites (10)
- Rotocraft (9)
- Baloons (aircraft) (8)
- Military uniforms (8)
- Spacesuits (8)
- Electrical systems (7)
- Wind tunnels (6)
- Instructional materials (5)
- Parachutes (life-saving equipment) (5)
- Sculpture (5)
- Specimens (5)
- Containers (4)
- Science fiction (4)
- Autopilots (3)
- Bombs (explosive weapons) (3)
- Breathing devices (3)
- Personal accessories (3)
- Photographs (3)
- Ammunition (2)
- Maps (2)
- Power producing equipment (2)
- Airships (1)
- Books (1)
- Experimental aircraft (1)
- Kites (equipment) (1)
- Landing equipment (1)
- Meteorological instruments (1)
- Mixed media (1)
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- Underwear (1)
- Popular culture (456)
- Aeronautics (258)
- Outer space (172)
- Photography (140)
- Art (93)
- Airlines (88)
- Science (88)
- Spaceflight (87)
- Navigation (59)
- Human spaceflight (58)
- War (43)
- Moon (26)
- Air traffic control (8)
- Electronic apparatus and appliances (5)
- Extravehicular activity (Human spaceflight) (3)
- Vietnam War, 1961-1975 (2)
- WW II (2)
- World War, 1939-1945 (2)
- Design (1)
- Manufacturing industries (1)
- WW I (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.