| Subject | Number of profiles |
|---|
| Abrasives | 1 |
| Abscisic acid | 2 |
| Abscisic acid--Metabolism | 1 |
| Absorption | 1 |
| Absorption of sound | 1 |
| Absorption spectra | 1 |
| Abstracts | 1 |
| Accelerometers | 3 |
| Accelerometers--Calibration | 1 |
| Accessible Web sites for people with disabilities | 1 |
| Accounting | 2 |
| Acoustic emission | 1 |
| Acoustic emission testing | 2 |
| Acoustic imaging | 1 |
| Acoustic impedance | 1 |
| Acoustic microscopes | 1 |
| Acoustic models | 1 |
| Acoustic surface waves | 1 |
| Acoustical engineering | 1 |
| Acoustooptical devices | 1 |
| Acquisition of property | 1 |
| Acquisitions (Libraries) | 1 |
| Actinobacillus | 1 |
| Active galaxies | 1 |
| Active noise and vibration control | 1 |
| Actuators | 3 |
| Actuators--Technological innovations | 1 |
| Adaptive control systems | 5 |
| Adaptive filters | 1 |
| Adenoviruses | 4 |
| Adhesion | 1 |
| Adhesives | 3 |
| Adsorption | 1 |
| Advertising | 2 |
| Aerodynamic load | 1 |
| Aerodynamic load--Measurement | 1 |
| Aerodynamic load--Measurement--Instruments | 1 |
| Aerodynamics | 20 |
| Aerodynamics--Mathematics | 1 |
| Aerodynamics, Hypersonic | 3 |
| Aeroelasticity | 3 |
| Aerofoils--Testing | 1 |
| Aeromagnetic prospecting | 1 |
| Aeromonas | 2 |
| Aeronautical instruments--Display systems | 3 |
| Aeronautical laboratories--Design and construction | 1 |
| Aeronautics | 7 |
| Aeronautics--Human factors | 3 |
| Aeronautics--Law and legislation--Canada | 1 |
| Aeronautics--Safety measures | 4 |
| Aeronautics--Safety measures--Equipment and supplies | 1 |
| Aeronautics--Technological innovations | 1 |
| Aeronautics, Commercial | 3 |
| Aeronautics, Commercial--Freight | 1 |
| Aeronautics in meteorology | 1 |
| Aerosols | 2 |
| Aerosols--Computer simulation | 1 |
| Aerospace engineering | 16 |
| Aerospace engineering--Data processing | 1 |
| Aerospace engineering--Information sources | 1 |
| Aerospace engineering--Materials | 2 |
| Aerospace industries | 2 |
| Aerospace industries--Materials | 1 |
| Affinity chromatography | 1 |
| Aggregates (Building materials) | 3 |
| Agricultural engineering | 1 |
| Agriculture | 12 |
| Agriculture--Information services | 1 |
| Agrobacterium | 2 |
| Air-brakes | 1 |
| Air-compressors | 1 |
| Air-compressors--Maintenance and repair | 1 |
| Air--Pollution | 4 |
| Air--Pollution--Computer simulation | 1 |
| Air--Pollution--Mathematical models | 3 |
| Air--Pollution--Measurement | 2 |
| Air--Purification | 3 |
| Air conditioning | 8 |
| Air flow | 5 |
| Air flow--Computer simulation | 1 |
| Air pressure | 1 |
| Air pressure--Measurement--Equipment and supplies | 1 |
| Air quality | 4 |
| Air quality--Computer simulation | 2 |
| Air quality--Mathematical models | 4 |
| Air quality--Psychological aspects | 1 |
| Air quality management | 2 |
| Aircraft accidents--Investigation | 1 |
| Aircraft bird strikes | 1 |
| Aircraft exhaust emissions | 1 |
| Aircraft gas-turbines--Installation | 1 |
| Aircraft gas-turbines--Testing | 2 |
| Airdrop | 3 |
| Airframes | 5 |
| Airframes--Certification | 1 |
| Airframes--Environmental testing | 1 |
| Airframes--Fatigue | 8 |
| Airframes--Inspection | 1 |
| Airframes--Maintenance and repair | 1 |
| Airframes--Materials | 1 |
| Airframes--Materials--Corrosion | 5 |
| Airframes--Materials--Nondestructive testing | 1 |
| Airframes--Materials--Testing | 1 |
| Airframes--Nondestructive testing | 1 |
| Airplanes | 3 |
| Airplanes--Airworthiness | 4 |
| Airplanes--Brakes | 1 |
| Airplanes--Cockpits | 1 |
| Airplanes--Control systems | 2 |
| Airplanes--Design and construction | 2 |
| Airplanes--Electric equipment--Maintenance and repair | 1 |
| Airplanes--Electronic equipment | 1 |
| Airplanes--Equipment and supplies--Installation | 1 |
| Airplanes--Flight testing | 8 |
| Airplanes--Flight testing--Instruments | 1 |
| Airplanes--Handling characteristics | 5 |
| Airplanes--Ice prevention | 4 |
| Airplanes--Inspection | 4 |
| Airplanes--Maintenance and repair | 11 |
| Airplanes--Materials | 1 |
| Airplanes--Materials--Corrosion | 1 |
| Airplanes--Materials--Testing | 1 |
| Airplanes--Mathematical models | 3 |
| Airplanes--Motors--Inspection | 1 |
| Airplanes--Motors--Testing | 2 |
| Airplanes--Painting | 1 |
| Airplanes--Performance | 5 |
| Airplanes--Performance--Mathematical models | 1 |
| Airplanes--Piloting | 4 |
| Airplanes--Radar equipment | 1 |
| Airplanes--Reliability | 1 |
| Airplanes--Windshields--Certification | 1 |
| Airplanes--Wings | 2 |
| Airplanes--Wings--Fatigue | 1 |
| Airplanes--Wings, Swept-back | 2 |
| Airplanes, Home-built | 1 |
| Airplanes, Military | 5 |
| Algae | 1 |
| Algae--Cultures and culture media | 1 |
| Algae culture | 1 |
| Algal blooms | 1 |
| Algebras, Linear | 2 |
| Algorithms | 4 |
| Alkali aggregate reaction | 1 |
| Alloys | 8 |
| Altitudes | 1 |
| Aluminium alloys--Welding | 1 |
| Aluminum | 4 |
| Aluminum--Welding | 1 |
| Aluminum alloys | 3 |
| Aluminum alloys--Testing | 1 |
| Aluminum forming | 2 |
| Alzheimer's disease | 3 |
| Amino acid sequence | 2 |
| Amorphous semiconductors | 1 |
| Amplifiers (Electronics) | 2 |
| Amplifiers (Electronics)--Design and construction | 1 |
| Anaerobic bacteria | 3 |
| Anaerobic bacteria--Cultures and culture media | 1 |
| Analog-to-digital converters | 2 |
| Analog-to-digital converters--Testing | 1 |
| Analog electronic systems | 4 |
| Analog electronic systems--Design and construction | 1 |
| Analytical biochemistry | 4 |
| Anechoic chambers | 1 |
| Anemometer | 1 |
| Anemometer--Calibration | 1 |
| Angels (Investors) | 1 |
| Angioplasty | 1 |
| Angle of attack (Aerodynamics) | 2 |
| Animal cell biotechnology | 1 |
| Animal experimentation--Moral and ethical aspects | 2 |
| Animal health | 1 |
| Animal nutrition | 1 |
| Anisotropy | 1 |
| Anodes | 2 |
| Anoxemia | 1 |
| ANSYS (Computer system) | 1 |
| Antenna arrays | 3 |
| Antennas (Electronics) | 3 |
| Antennas (Electronics)--Design and construction | 1 |
| Antennas (Electronics)--Simulation methods | 1 |
| Antibiotics | 1 |
| Antigens | 1 |
| Antigens--Analysis | 2 |
| Antioxidants | 2 |
| Antisense DNA | 3 |
| Apoptosis | 13 |
| Application software | 6 |
| Application software--Development | 5 |
| Approximation theory | 1 |
| Aquacultural engineering | 1 |
| Aquaculture | 21 |
| Aquaculture--Information services | 1 |
| Aquaculture industry | 1 |
| Aquatic biology | 3 |
| Arabidopsis | 1 |
| Archaebacteria | 6 |
| Archaebacteria--Cultures and culture media | 1 |
| Architectural acoustics | 7 |
| Architectural acoustics--Standards | 1 |
| Architecture | 5 |
| Archival materials--Digitization | 1 |
| Archives--Automation | 1 |
| Argon lasers | 1 |
| Armed Forces--Procurement | 1 |
| Armored vehicles, Military | 1 |
| Array processors | 1 |
| Art and science | 1 |
| Art and technology | 1 |
| Arterial occlusions | 1 |
| Arteries | 1 |
| Artificial intelligence | 10 |
| Artificial intelligence--Industrial applications | 1 |
| Artificial satellites | 1 |
| Asphalt | 1 |
| Assembler language (Computer program language) | 3 |
| Assembly-line methods | 1 |
| Assembly-line methods--Planning | 1 |
| Assistance in emergencies | 1 |
| Associations, institutions, etc.--Management | 1 |
| Asteroids | 1 |
| Astrometry | 2 |
| Astronomical instruments | 4 |
| Astronomical instruments--Automatic control | 1 |
| Astronomical instruments--Design and construction | 5 |
| Astronomical instruments--Testing | 1 |
| Astronomical masers | 1 |
| Astronomical observatories | 2 |
| Astronomical observatories--Management | 1 |
| Astronomical photometry | 3 |
| Astronomical spectroscopy | 5 |
| Astronomical spectroscopy--Instruments | 1 |
| Astronomy | 15 |
| Astronomy--Data processing | 1 |
| Astronomy--Databases | 2 |
| Astronomy--Instruments | 1 |
| Astronomy--Observations | 1 |
| Astronomy--Public relations | 1 |
| Astrophysics | 6 |
| Astrophysics--Instruments | 1 |
| Asymmetric synthesis | 1 |
| ATLAS (Computer program language) | 1 |
| Atmospheric chemistry | 1 |
| Atmospheric ozone | 1 |
| Atmospheric ozone--Computer simulation | 1 |
| Atmospheric pressure | 1 |
| Atomic clocks | 1 |
| Atomic force microscopy | 9 |
| Atomic frequency standards | 2 |
| Atomic spectroscopy | 1 |
| Atomization | 5 |
| Atomizers | 1 |
| Atoms | 2 |
| Atrium buildings--Fires and fire prevention | 1 |
| Atriums | 1 |
| Attention | 1 |
| Audio frequency | 1 |
| Auditing | 3 |
| Auditing, Internal | 2 |
| Auger effect | 2 |
| Authentication | 1 |
| Autoclaves | 3 |
| Autoimmunity | 1 |
| Automatic classification | 2 |
| Automatic control | 21 |
| Automatic machinery | 1 |
| Automatic speech recognition | 2 |
| Automatic test equipment | 1 |
| Automation | 19 |
| Automobiles | 3 |
| Automobiles--Antilock brake systems | 2 |
| Automobiles--Effect of environment on | 1 |
| Automobiles--Electric equipment--Design and construction | 1 |
| Automobiles--Equipment and supplies--Design and construction | 1 |
| Automobiles--Fuel systems | 3 |
| Automobiles--Hydraulic equipment--Design and construction | 1 |
| Automobiles--Maintenance and repair | 3 |
| Automobiles--Motors--Fuel injection systems | 1 |
| Automobiles--Recycling | 1 |
| Automobiles--Testing | 2 |
| Automobiles, Racing | 1 |
| Available light photography | 1 |
| Aviation | 1 |
| Avionics | 8 |
| Avionics--Maintenance and repair | 1 |
