- Protective and life-saving equipment (45)
- Tools (41)
- Communication systems (mechanical and electrical systems) (34)
- Avionics (27)
- Artificial satellites (10)
- Testing equipment (10)
- Scientific instruments (7)
- Electrical systems (5)
- Parachutes (life-saving equipment) (5)
- Specimens (5)
- Containers (4)
- Instructional materials (4)
- Breathing devices (3)
- Autopilots (2)
- Power producing equipment (2)
- Landing equipment (1)
- Meteorological instruments (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.