- Memorabilia (566)
- Aircraft (357)
- Personal equipment (357)
- Awards (324)
- Models (250)
- Equipment (232)
- Propulsion systems (212)
- Rockets (193)
- Components (objects) (158)
- Medals (153)
- Photographic equipment (140)
- Insignias (136)
- Works of art (99)
- Uncrewed spacecraft (94)
- Scientific instruments (87)
- Uniforms (87)
- Crewed spacecraft (82)
- Missiles (70)
- Instruments (63)
- Flight instruments (61)
- Protective and life-saving equipment (59)
- Engines (56)
- Headgear (52)
- Helmets (52)
- Reciprocating (piston) engines (51)
- Rotary engines (51)
- Engines (power producing equipment) (45)
- Avionics (44)
- Costume accessories (44)
- Communication systems (mechanical and electrical systems) (41)
- Tools (41)
- Weapons (36)
- Payloads (35)
- Prints (35)
- Culinary equipment for serving and consuming food (34)
- Food (34)
- Navigational instruments (34)
- Originals (34)
- Rotorcraft (28)
- Trophies (24)
- Testing equipment (23)
- Handwear (22)
- Sights (firearm component) (22)
- Clothing (21)
- Paintings (21)
- Protective wear (21)
- Medical equipment (20)
- Propellers (20)
- Jet aircraft (17)
- Personal equipment: grooming, hygiene and health care (17)
- Turbines (17)
- Computers (16)
- Impellers (16)
- Footwear (15)
- Radar (15)
- Military uniforms (12)
- Artificial satellites (10)
- Rotocraft (9)
- Baloons (aircraft) (8)
- Spacesuits (7)
- Electrical systems (6)
- Wind tunnels (6)
- Bombs (explosive weapons) (5)
- Instructional materials (5)
- Parachutes (life-saving equipment) (5)
- Sculpture (5)
- Specimens (5)
- Air and space transportation vehicles (4)
- Containers (4)
- Science fiction (4)
- Autopilots (3)
- Personal accessories (3)
- Photographs (3)
- Ammunition (2)
- Breathing devices (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)
- Posters (1)
- Sound recordings (1)
- Underwear (1)
- Popular culture (455)
- Aeronautics (257)
- Outer space (170)
- Photography (141)
- Art (94)
- Science (88)
- Airlines (87)
- Spaceflight (84)
- Navigation (61)
- Human spaceflight (58)
- War (50)
- Moon (26)
- Air traffic control (8)
- Electronic apparatus and appliances (5)
- Extravehicular activity (Human spaceflight) (3)
- Vietnam War, 1961-1975 (2)
- WW I (2)
- World War, 1914-1918 (2)
- Design (1)
- Manufacturing industries (1)
- WW II (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.