-
25.
Airplanes
Subjects
Flying machinesAeronauticsAircraft industry
-
26.
Airports
Subjects
Aeronautics
-
27.
Alternating current motors
Subjects
Electric motors
-
28.
Alternating currents
Subjects
Electric currents
-
29.
Aluminothermy
Subjects
MetallurgyWelding
-
30.
Amateur radio stations
Subjects
Radio stations
-
31.
Ammunition
Subjects
ExplosivesProjectiles
-
32.
Amplifiers (Electronics)
Subjects
Electronics
-
33.
Analog electronic systems
Subjects
Electronic systems
-
34.
Anchors
Subjects
-
35.
Antennas (Electronics)
Subjects
Electronic apparatus and appliances
-
36.
Antiaircraft artillery
Subjects
Artillery
-
37.
Antitanks guns
Subjects
Field artilleryOrdnance
-
38.
Application-specific integrated circuits
Subjects
Integrated circuits
-
39.
Applied mechanics
Subjects
Engineering mathematics
-
40.
Aqueducts
Subjects
Distribution of waterCivil engineeringHydraulic structures
-
41.
Architectural lighting
Subjects
ArchitectureInterior decoration
-
42.
Area measurement
Subjects
Figure of the EarthMathematical geography
-
43.
Armor
Subjects
Weapons
-
44.
Armored military vehicles
Subjects
-
45.
Armorial bindings
Subjects
Book collectingBookbinding
-
46.
Armories
Subjects
Military architecture
-
47.
Art and technology
Subjects
-
48.
Artesian wells
Subjects
Water-supplyHydraulic structuresWells
Last updated dated: 17/11/2024