- National security--United States--Congresses (8)
- Chemical detectors--Congresses (4)
- Aeronautical instruments--Display systems--Congresses (2)
- Biosensors--Congresses (2)
- High power lasers--Congresses (2)
- Laser weapons--Congresses (2)
- Lasers--Military applications--Congresses (2)
- Nondestructive testing--Congresses (2)
- Penetrant inspection--Congresses (2)
- Aeronautical instruments--Display systems--Military aspects--Congresses (1)
- Detection of explosives--Congresses (1)
- Explosives--Detection--Congresses (1)