| 1 | Astrophysics | 537 | 35.9K | 268 | 296 |
| 2 | Astronomy | 448 | 25.3K | 263 | 281 |
| 3 | Physics | 503 | 22.0K | 705 | 830 |
| 4 | Geophysics | 417 | 17.9K | 216 | 196 |
| 5 | Chemistry | 476 | 16.7K | 788 | 902 |
| 6 | Spectrum analysis | 203 | 15.8K | 423 | 371 |
| 7 | Geology | 265 | 15.2K | 200 | 139 |
| 8 | Carbon | 60 | 12.1K | 115 | 18 |
| 9 | Geochemistry | 248 | 12.1K | 98 | 111 |
| 10 | Biochemistry | 337 | 11.7K | 895 | 872 |
| 11 | Science | 133 | 11.2K | 1,344 | 1,048 |
| 12 | Earth Sciences | 168 | 11.0K | 209 | 132 |
| 13 | Biology | 137 | 10.3K | 1,202 | 1,070 |
| 14 | Economics | 125 | 9.8K | 577 | 213 |
| 15 | econometric models | 25 | 6.9K | 45 | 1 |
| 16 | Materials | 146 | 6.8K | 964 | 792 |
| 17 | Molecular Biology | 148 | 6.6K | 1,112 | 1,067 |
| 18 | Medicine | 102 | 6.6K | 1,630 | 1,161 |
| 19 | Combustion | 169 | 6.1K | 59 | 61 |
| 20 | clay | 78 | 5.9K | 13 | 5 |
| 21 | Pharmaceutical Chemistry | 121 | 5.3K | 412 | 347 |
| 22 | Natural history | 26 | 5.3K | 993 | 919 |
| 23 | Immunology | 47 | 4.4K | 718 | 502 |
| 24 | Geodynamics | 72 | 4.0K | 73 | 61 |
| 25 | Research | 88 | 3.9K | 1,538 | 1,211 |
| 26 | Atmospheric Physics | 108 | 3.7K | 186 | 233 |
| 27 | Petrology | 79 | 3.7K | 116 | 131 |
| 28 | Mineralogy | 90 | 3.6K | 153 | 148 |
| 29 | Ecology | 76 | 3.6K | 1,215 | 1,189 |
| 30 | Catalysis | 116 | 3.6K | 632 | 782 |
| 31 | Mathematics | 267 | 3.5K | 671 | 649 |
| 32 | Meteorites | 56 | 3.5K | 179 | 178 |
| 33 | Chemical Engineering | 48 | 3.4K | 1,310 | 896 |
| 34 | Organic Chemistry | 127 | 3.4K | 329 | 403 |
| 35 | Atmospheric Chemistry | 83 | 3.4K | 126 | 181 |
| 36 | Cosmochemistry | 76 | 3.3K | 33 | 38 |
| 37 | Biophysics | 117 | 3.3K | 900 | 956 |
| 38 | Botany | 73 | 3.2K | 792 | 743 |
| 39 | Biogeochemistry | 66 | 3.2K | 118 | 167 |
| 40 | Surface Chemistry | 85 | 3.1K | 705 | 657 |
| 41 | Immunity | 18 | 3.0K | 613 | 445 |
| 42 | Colloids | 71 | 2.9K | 787 | 726 |
| 43 | Pollution | 74 | 2.9K | 1,056 | 1,197 |
| 44 | Planets | 77 | 2.9K | 270 | 309 |
| 45 | Organic Geochemistry | 56 | 2.7K | 19 | 37 |
| 46 | Clinical Chemistry | 59 | 2.6K | 469 | 410 |
| 47 | Environment | 42 | 2.6K | 1,238 | 1,253 |
| 48 | Asia | 36 | 2.5K | 512 | 113 |
| 49 | Nanostructured Materials | 78 | 2.4K | 584 | 658 |
| 50 | Bioorganic chemistry | 71 | 2.3K | 407 | 439 |
| 51 | Microbiology | 28 | 2.3K | 2,035 | 1,419 |
| 52 | Soil Science | 46 | 2.2K | 295 | 239 |
| 53 | Polymers | 50 | 2.2K | 1,242 | 903 |
| 54 | Energy Policy | 28 | 2.2K | 786 | 519 |
| 55 | Solid State Physics | 98 | 2.2K | 777 | 798 |
| 56 | Physical Chemistry | 68 | 2.2K | 360 | 430 |
| 57 | Pharmacology | 27 | 2.1K | 1,671 | 1,057 |
| 58 | Plasma devices | 39 | 2.1K | 39 | 31 |
| 59 | energy resources | 22 | 2.1K | 365 | 270 |
| 60 | Condensed Matter | 72 | 1.9K | 788 | 799 |
| 61 | Cytology | 28 | 1.9K | 1,277 | 1,087 |
| 62 | Cell Biology | 32 | 1.9K | 1,139 | 1,096 |
| 63 | Analytical Chemistry | 67 | 1.9K | 1,004 | 1,059 |
| 64 | Materials Science | 54 | 1.9K | 1,131 | 1,135 |
| 65 | coal | 44 | 1.8K | 257 | 266 |
| 66 | polymerization | 39 | 1.8K | 1,194 | 836 |
| 67 | Cancer | 11 | 1.8K | 1,351 | 778 |
| 68 | clay minerals | 35 | 1.8K | 16 | 16 |
| 69 | Biotechnology | 46 | 1.8K | 1,476 | 1,481 |
| 70 | Immune system | 7 | 1.8K | 544 | 310 |
| 71 | Immunotherapy | 10 | 1.8K | 850 | 367 |
| 72 | Nanotechnology | 54 | 1.8K | 1,243 | 1,338 |
| 73 | atmospheric models | 20 | 1.7K | 204 | 141 |
| 74 | Statistical physics | 82 | 1.6K | 718 | 817 |
| 75 | Mineral resources | 9 | 1.6K | 225 | 23 |
| 76 | Mathematical Physics | 93 | 1.6K | 446 | 522 |
| 77 | Electrochemistry | 72 | 1.6K | 906 | 894 |
| 78 | Ore deposits | 53 | 1.6K | 48 | 60 |
| 79 | Nuclear Physics | 83 | 1.6K | 1,074 | 1,187 |
| 80 | Composite Materials | 51 | 1.6K | 594 | 730 |
| 81 | Solid State Chemistry | 55 | 1.6K | 501 | 402 |
| 82 | Optical materials | 13 | 1.5K | 1,335 | 728 |
| 83 | nucleic acids | 29 | 1.4K | 488 | 549 |
| 84 | probabilities | 62 | 1.4K | 193 | 120 |
| 85 | Environmental Health | 42 | 1.4K | 1,373 | 1,496 |
| 86 | environmental pollution | 38 | 1.3K | 1,221 | 1,353 |
| 87 | Functional Analysis | 47 | 1.3K | 198 | 139 |
| 88 | Environmental Engineering | 41 | 1.2K | 872 | 1,002 |
| 89 | Virology | 2 | 1.2K | 2,529 | 987 |
| 90 | soil management | 10 | 1.2K | 230 | 86 |
| 91 | Biocompatible Materials | 35 | 1.2K | 1,138 | 1,315 |
| 92 | Plant physiology | 37 | 1.2K | 538 | 686 |
| 93 | Economic History | 56 | 1.1K | 599 | 602 |
| 94 | Chromatographic analysis | 64 | 1.1K | 182 | 235 |
| 95 | Mass Spectrometry | 39 | 1.1K | 205 | 215 |
| 96 | Environmental Geology | 24 | 1.1K | 399 | 275 |
| 97 | Critical Care | 4 | 1.1K | 999 | 520 |
| 97 | Critical Care Medicine | 4 | 1.1K | 956 | 526 |
| 99 | Paleoclimatology | 19 | 1.1K | 388 | 302 |
| 100 | Biomass Energy | 20 | 1.0K | 878 | 869 |
| 101 | Biomedical Engineering | 53 | 1.0K | 1,125 | 1,469 |
| 102 | mathematical analysis | 66 | 1.0K | 479 | 432 |
| 103 | Chromatography | 51 | 1.0K | 183 | 232 |
| 104 | Solar System | 26 | 998 | 226 | 213 |
| 105 | tillage | 3 | 994 | 400 | 86 |
| 106 | Econometrics | 23 | 986 | 430 | 317 |
| 107 | Nonlinear Dynamics | 39 | 979 | 580 | 598 |
| 108 | Plasma chemistry | 36 | 972 | 27 | 40 |
| 109 | Hydrology | 27 | 961 | 723 | 664 |
| 109 | Biochemical Engineering | 21 | 961 | 1,269 | 1,446 |
| 111 | Volcanoes | 23 | 958 | 58 | 51 |
| 112 | Environmental Chemistry | 11 | 957 | 1,016 | 733 |
| 113 | Virulence | 9 | 944 | 557 | 465 |
| 114 | Meteorology | 14 | 936 | 975 | 740 |
| 115 | Molecular Spectroscopy | 6 | 925 | 1,353 | 307 |
| 116 | Solitons | 5 | 907 | 939 | 149 |
| 116 | Fractals | 5 | 907 | 944 | 150 |
| 116 | Chaos | 5 | 907 | 939 | 149 |
| 119 | Molecular structure | 30 | 899 | 631 | 620 |
| 120 | International Finance | 29 | 897 | 423 | 400 |
| 121 | Engineering Geology | 12 | 890 | 669 | 371 |
| 122 | Geomagnetism | 24 | 877 | 180 | 147 |
| 123 | Fluid Dynamics | 35 | 873 | 216 | 240 |
| 124 | Geomorphology | 19 | 870 | 502 | 458 |
| 125 | sanitation | 18 | 858 | 558 | 722 |
| 126 | Host-parasite interactions | 8 | 852 | 641 | 515 |
| 127 | Industrial Microbiology | 3 | 841 | 1,866 | 646 |
| 128 | Medical Laboratory Science | 5 | 835 | 1,406 | 701 |
| 129 | Sports Medicine | 66 | 822 | 412 | 701 |
| 130 | Neurology | 30 | 820 | 1,461 | 1,637 |
| 131 | Energy Conversion | 5 | 819 | 952 | 612 |
| 132 | Archaeology | 43 | 818 | 275 | 278 |
| 132 | Water | 15 | 818 | 1,077 | 1,020 |
| 134 | Drug delivery systems | 7 | 811 | 992 | 500 |
| 135 | Metabolism | 14 | 808 | 1,027 | 929 |
| 136 | Cell death | 5 | 806 | 803 | 498 |
| 137 | Climatology | 11 | 798 | 865 | 583 |
| 138 | Building Materials | 16 | 787 | 781 | 752 |
| 139 | Environmental Management | 17 | 783 | 1,215 | 1,223 |
| 140 | gene therapy | 18 | 775 | 313 | 334 |
| 141 | Physiology | 27 | 742 | 1,330 | 1,419 |
| 142 | Environmental monitoring | 30 | 740 | 1,174 | 1,578 |
| 143 | Genetic therapy | 17 | 735 | 350 | 337 |
| 144 | Middle East | 18 | 727 | 258 | 85 |
| 145 | Electrophoresis | 34 | 725 | 311 | 414 |
| 146 | Paleoecology | 12 | 721 | 526 | 353 |
| 147 | Plasma polymerization | 26 | 717 | 24 | 34 |
| 148 | soil microbiology | 10 | 716 | 757 | 661 |
| 149 | concrete | 14 | 704 | 360 | 407 |
| 150 | Paleogeography | 11 | 688 | 460 | 333 |
| 151 | exobiology | 9 | 684 | 107 | 88 |
| 152 | Control Theory | 31 | 678 | 496 | 491 |
| 153 | Africa | 19 | 674 | 452 | 200 |
| 154 | drug evaluation | 7 | 673 | 767 | 289 |
| 155 | Chemical kinetics | 28 | 669 | 76 | 34 |
| 156 | Engineering | 33 | 665 | 1,266 | 1,209 |
| 157 | Genetics | 22 | 658 | 1,193 | 1,413 |
| 158 | Robotics | 15 | 656 | 726 | 516 |
| 159 | Therapeutics | 2 | 649 | 1,565 | 604 |
| 160 | Kinetics | 27 | 642 | 33 | 43 |
| 161 | Automation | 24 | 634 | 777 | 920 |
| 162 | Numerical Analysis | 31 | 621 | 679 | 610 |
| 162 | Quantum Gravity | 31 | 621 | 854 | 946 |
| 164 | Toxicology | 28 | 617 | 1,494 | 1,837 |
| 164 | drug therapy | 2 | 617 | 1,771 | 710 |
| 166 | Entomology | 21 | 611 | 822 | 586 |
| 167 | Bioengineering | 25 | 604 | 1,408 | 1,845 |
| 168 | nuclear magnetic resonance | 32 | 588 | 263 | 307 |
| 169 | economic policy | 25 | 585 | 722 | 581 |
| 170 | Bones | 9 | 584 | 353 | 313 |
| 171 | natural disasters | 17 | 581 | 365 | 384 |
| 172 | Probability | 7 | 570 | 330 | 152 |
| 173 | Sports | 28 | 557 | 653 | 707 |
| 174 | Soil biology | 9 | 556 | 510 | 478 |
| 175 | Optics | 27 | 545 | 1,605 | 1,399 |
| 176 | Microscopy | 31 | 543 | 241 | 346 |
| 177 | Sedimentary rocks | 15 | 539 | 173 | 188 |
| 178 | Labor Economics | 4 | 533 | 423 | 130 |
| 179 | Environmental Policy | 12 | 526 | 1,598 | 1,592 |
| 180 | Statistics | 8 | 522 | 1,631 | 819 |
| 181 | proteins | 19 | 514 | 735 | 730 |
| 182 | Signal Processing | 36 | 508 | 720 | 1,103 |
| 182 | Magnetic Resonance Spectroscopy | 34 | 508 | 269 | 342 |
| 184 | Renewable Energy Sources | 7 | 507 | 1,843 | 1,687 |
| 185 | Cement | 10 | 502 | 267 | 341 |
| 186 | Ceramics | 18 | 500 | 498 | 440 |
| 187 | Nonlinear functional analysis | 19 | 499 | 360 | 264 |
| 188 | gene transfer | 10 | 495 | 65 | 37 |
| 188 | genetic transformation | 10 | 495 | 65 | 37 |
| 190 | Molecular Genetics | 12 | 493 | 850 | 849 |
| 191 | China | 10 | 489 | 1,558 | 897 |
| 191 | Membranes | 12 | 489 | 860 | 858 |
| 193 | Zeolites | 9 | 481 | 472 | 364 |
| 194 | Mechanics | 12 | 475 | 602 | 351 |
| 195 | Glass | 14 | 473 | 419 | 391 |
| 196 | finance | 16 | 471 | 1,035 | 907 |
| 197 | Neurophysiology | 14 | 468 | 1,238 | 1,250 |
| 197 | Investment analysis | 4 | 468 | 842 | 227 |
| 199 | pottery | 11 | 458 | 474 | 390 |
| 200 | Green Chemistry | 10 | 457 | 983 | 997 |
| 200 | Ceramic materials | 26 | 457 | 312 | 448 |
| 202 | Raman spectroscopy | 18 | 456 | 178 | 205 |
| 203 | Sun | 11 | 449 | 167 | 134 |
| 204 | Radiation | 25 | 446 | 647 | 687 |
| 205 | Evolution | 10 | 444 | 951 | 889 |
| 206 | Wildlife conservation | 2 | 443 | 1,237 | 583 |
| 207 | emergency management | 12 | 439 | 204 | 191 |
| 207 | Molecules | 17 | 439 | 646 | 559 |
| 209 | Forest Ecology | 12 | 435 | 468 | 473 |
| 210 | Image Processing | 23 | 426 | 777 | 1,027 |
| 211 | Minerals | 23 | 416 | 105 | 179 |
| 212 | Manufacturing Processes | 47 | 411 | 455 | 1,005 |
| 213 | Molecular ecology | 6 | 410 | 703 | 640 |
| 214 | Economic Development | 19 | 407 | 511 | 781 |
| 215 | Technology | 23 | 406 | 1,353 | 1,571 |
| 216 | nanoscience | 15 | 405 | 1,329 | 1,563 |
| 217 | nuclear magnetic resonance spectroscopy | 21 | 404 | 185 | 220 |
| 218 | Computational Biology | 20 | 403 | 837 | 1,091 |
| 219 | free radicals | 4 | 397 | 1,047 | 809 |
| 220 | Drug design | 5 | 396 | 1,118 | 656 |
| 221 | United States | 11 | 392 | 2,555 | 1,977 |
| 222 | Fluid Mechanics | 13 | 390 | 704 | 635 |
| 222 | Climate change | 4 | 390 | 813 | 877 |
| 222 | Biodiversity conservation | 4 | 390 | 1,316 | 1,073 |
| 222 | Eutrophication | 4 | 390 | 774 | 871 |
| 226 | Sites | 7 | 389 | 335 | 264 |
| 227 | Geography | 12 | 388 | 968 | 894 |
| 227 | Bioinorganic chemistry | 13 | 388 | 697 | 618 |
| 229 | Differential Equations | 16 | 385 | 399 | 350 |
| 230 | Photochemistry | 16 | 384 | 641 | 725 |
| 231 | biological evolution | 9 | 381 | 1,093 | 1,141 |
| 232 | protein | 7 | 380 | 735 | 500 |
| 233 | Semiconductors | 17 | 377 | 842 | 750 |
| 234 | Agricultural Chemistry | 7 | 376 | 1,470 | 1,135 |
| 234 | Physical organic chemistry | 20 | 376 | 487 | 576 |
| 236 | Medical genetics | 7 | 371 | 1,290 | 1,242 |
| 237 | Allergy | 2 | 370 | 1,023 | 703 |
| 238 | Inflammation | 7 | 366 | 648 | 592 |
| 239 | Metallurgy | 19 | 362 | 851 | 961 |
| 240 | Biodiversity | 13 | 355 | 989 | 1,058 |
| 241 | Radiography | 7 | 351 | 417 | 484 |
| 242 | Electronics | 22 | 350 | 1,313 | 1,448 |
| 243 | Geometry | 22 | 348 | 396 | 257 |
| 244 | Cytogenetics | 3 | 345 | 1,140 | 768 |
| 245 | analysis | 4 | 344 | 320 | 186 |
| 246 | Population Genetics | 5 | 340 | 874 | 669 |
| 247 | Genomics | 11 | 338 | 1,461 | 1,491 |
| 247 | environmental protection | 11 | 338 | 1,926 | 1,955 |
| 249 | Forest Management | 8 | 333 | 558 | 512 |
| 250 | drugs | 10 | 329 | 1,025 | 913 |
| 251 | explosives | 15 | 322 | 43 | 31 |
| 252 | Biopharmaceutics | 8 | 316 | 588 | 561 |
| 252 | soil conservation | 12 | 316 | 253 | 345 |
| 254 | synthesis | 32 | 315 | 117 | 225 |
| 255 | glycoproteins | 12 | 313 | 156 | 217 |
| 255 | Glycoconjugates | 12 | 313 | 156 | 217 |
| 255 | glycolipids | 12 | 313 | 156 | 217 |
| 258 | Solar Energy | 6 | 312 | 1,252 | 1,056 |
| 258 | plant communities | 6 | 312 | 737 | 718 |
| 260 | Microelectronics | 12 | 310 | 867 | 1,021 |
| 261 | soil pollution | 11 | 308 | 142 | 152 |
| 262 | Plant tissue culture | 4 | 307 | 602 | 298 |
| 263 | Plant cell culture | 3 | 306 | 622 | 292 |
| 264 | Chemical Oceanography | 2 | 303 | 324 | 175 |
| 265 | Physical Geography | 12 | 302 | 155 | 185 |
| 266 | arthritis | 4 | 301 | 780 | 663 |
| 267 | Ferroelectricity | 15 | 300 | 420 | 313 |
| 268 | Nanoparticles | 6 | 297 | 1,367 | 1,074 |
| 268 | software | 5 | 297 | 781 | 590 |
| 270 | Educational Psychology | 15 | 296 | 618 | 760 |
| 270 | Heterocyclic compounds | 29 | 296 | 165 | 221 |
| 272 | Microstructure | 26 | 293 | 105 | 190 |
| 273 | Nanoelectronics | 9 | 292 | 406 | 212 |
| 274 | Pharmaceutical Technology | 13 | 287 | 699 | 844 |
| 275 | Photobiology | 8 | 284 | 778 | 667 |
| 276 | Petroleum Geology | 9 | 282 | 266 | 267 |
| 276 | Electron Microscopy | 11 | 282 | 148 | 124 |
| 276 | cytokines | 4 | 282 | 949 | 683 |
| 276 | Petroleum | 12 | 282 | 93 | 54 |
| 276 | natural gas | 12 | 282 | 125 | 161 |
| 281 | Logic Programming | 8 | 279 | 155 | 67 |
| 281 | catalytic activity | 12 | 279 | 265 | 394 |
| 283 | Carbohydrates | 13 | 276 | 122 | 227 |
| 284 | Artificial Intelligence | 21 | 275 | 1,467 | 2,084 |
| 284 | Developing countries | 14 | 275 | 955 | 1,123 |
| 286 | Marine Geology | 7 | 274 | 361 | 280 |
| 287 | Pathology | 6 | 270 | 1,199 | 1,087 |
| 287 | Developmental Genetics | 5 | 270 | 344 | 412 |
| 289 | cell interaction | 3 | 263 | 932 | 671 |
| 289 | Cell communication | 3 | 263 | 559 | 386 |
| 291 | fuel cells | 10 | 262 | 676 | 905 |
| 292 | Information Systems | 12 | 255 | 589 | 696 |
| 292 | Bacteriology | 11 | 255 | 886 | 1,209 |
| 294 | Gene expression regulation | 5 | 251 | 657 | 555 |
| 294 | Genetic regulation | 5 | 251 | 742 | 689 |
| 296 | Oceanography | 7 | 250 | 1,072 | 1,001 |
| 297 | energy conservation | 4 | 247 | 1,818 | 1,528 |
| 298 | mass transfer | 14 | 245 | 790 | 1,077 |
| 299 | Biogeochemical cycles | 1 | 243 | 604 | 389 |
| 300 | Endocrinology | 6 | 241 | 1,697 | 1,656 |
| 301 | radiative transfer | 17 | 240 | 200 | 262 |
| 302 | Respiration | 8 | 231 | 825 | 870 |
| 303 | Crystallography | 16 | 229 | 724 | 550 |
| 304 | viral genetics | 2 | 228 | 305 | 345 |
| 305 | Ultrasonics | 3 | 225 | 1,204 | 861 |
| 306 | Rheumatology | 2 | 223 | 1,099 | 675 |
| 307 | Attention | 2 | 222 | 1,540 | 873 |
| 307 | Perception | 2 | 222 | 1,644 | 957 |
| 309 | Dynamics | 19 | 221 | 559 | 726 |
| 310 | marketing | 9 | 218 | 1,158 | 1,293 |
| 311 | Brain | 8 | 216 | 1,436 | 1,564 |
| 311 | Information Science | 9 | 216 | 1,492 | 1,704 |
| 311 | Plant cells | 5 | 216 | 766 | 1,038 |
| 314 | Visual Perception | 1 | 215 | 1,840 | 858 |
| 314 | Memory | 1 | 215 | 1,998 | 996 |
| 316 | Business | 10 | 213 | 1,214 | 1,612 |
| 317 | Diagnostic Imaging | 14 | 212 | 736 | 989 |
| 318 | Natural resources | 5 | 211 | 559 | 504 |
| 318 | Australia | 3 | 211 | 1,783 | 862 |
| 320 | Biomechanics | 5 | 207 | 976 | 787 |
| 321 | Sonochemistry | 2 | 206 | 821 | 597 |
| 321 | Eastern Europe | 12 | 206 | 275 | 214 |
| 323 | Hormones | 5 | 204 | 870 | 816 |
| 324 | Lightweight concrete | 4 | 202 | 348 | 474 |
| 324 | System analysis | 17 | 202 | 967 | 1,435 |
| 324 | Informatics | 10 | 202 | 401 | 534 |
| 327 | Sustainable Engineering | 5 | 198 | 1,271 | 1,223 |
| 327 | cell adhesion molecules | 2 | 198 | 232 | 186 |
| 327 | United Kingdom | 8 | 198 | 821 | 927 |
| 330 | Biometrics | 4 | 194 | 853 | 581 |
| 331 | Physical fitness | 8 | 193 | 610 | 705 |
| 332 | Plant Ecology | 7 | 192 | 1,120 | 1,327 |
| 332 | Enzyme inhibitors | 10 | 192 | 126 | 199 |
| 332 | Neural circuitry | 6 | 192 | 1,508 | 1,489 |
| 335 | Nanostructures | 7 | 191 | 1,309 | 1,415 |
| 335 | Oligosaccharide | 5 | 191 | 191 | 229 |
| 337 | rehabilitation | 9 | 190 | 1,175 | 1,307 |
| 338 | Paleontology | 4 | 188 | 1,098 | 735 |
| 338 | Metabolic diseases | 5 | 188 | 1,382 | 1,433 |
| 340 | Liquid chromatography | 16 | 187 | 99 | 119 |
| 341 | ecosystem | 4 | 186 | 1,090 | 1,033 |
| 341 | Plant diseases | 4 | 186 | 1,633 | 1,179 |
| 343 | Human genetics | 4 | 185 | 1,262 | 1,764 |
| 343 | Statistical Mechanics | 7 | 185 | 419 | 332 |
| 343 | Communist countries | 14 | 185 | 18 | 24 |
| 346 | biocatalysis | 1 | 184 | 310 | 337 |
| 346 | Homogeneous catalysis | 1 | 184 | 310 | 337 |
| 346 | Heterogeneous catalysis | 1 | 184 | 310 | 337 |
| 349 | Atomic spectroscopy | 6 | 182 | 803 | 645 |
| 350 | Neurochemistry | 11 | 181 | 1,153 | 1,493 |
| 350 | Computer-Aided Design | 14 | 181 | 464 | 717 |
| 352 | Calculus of Variations | 8 | 178 | 306 | 246 |
| 352 | Quantum theory | 16 | 178 | 390 | 591 |
| 354 | Pesticides | 4 | 177 | 539 | 321 |
| 355 | Medical Physics | 7 | 176 | 969 | 1,047 |
| 356 | natural products | 16 | 173 | 714 | 1,097 |
| 356 | water supply | 7 | 173 | 525 | 694 |
| 358 | economic conditions | 4 | 172 | 431 | 368 |
| 359 | Marine Biology | 6 | 171 | 1,746 | 1,735 |
| 360 | Information Theory | 5 | 169 | 1,101 | 879 |
| 360 | actuators | 10 | 169 | 1,236 | 1,696 |
| 360 | transducers | 10 | 169 | 1,236 | 1,696 |
| 363 | plasma | 5 | 168 | 59 | 35 |
| 363 | Agriculture | 5 | 168 | 1,595 | 1,405 |
| 365 | Agricultural Ecology | 5 | 167 | 755 | 923 |
| 366 | Hydrodynamics | 5 | 166 | 446 | 438 |
| 367 | Crystal growth | 12 | 162 | 470 | 766 |
| 368 | Systems Engineering | 9 | 160 | 1,283 | 1,436 |
| 368 | Molecular Pharmacology | 2 | 160 | 939 | 724 |
| 368 | Electrochemical Analysis | 7 | 160 | 1,086 | 1,134 |
| 371 | Developmental Biology | 8 | 159 | 1,067 | 1,473 |
| 371 | Environmental pollutants | 6 | 159 | 1,611 | 1,823 |
| 373 | Soft Condensed Matter | 9 | 157 | 592 | 746 |
| 374 | Economic Thought | 3 | 155 | 300 | 323 |
| 374 | Autoantibodies | 2 | 155 | 594 | 458 |
| 374 | Autoimmunity | 2 | 155 | 731 | 606 |
| 374 | Autoimmune diseases | 2 | 155 | 644 | 488 |
| 378 | sedimentary basins | 1 | 154 | 339 | 164 |
| 378 | Sales management | 1 | 154 | 438 | 322 |
| 378 | selling | 1 | 154 | 438 | 322 |
| 381 | Organometallic chemistry | 9 | 151 | 1,284 | 1,335 |
| 381 | peptides | 9 | 151 | 342 | 412 |
| 383 | Happiness | 1 | 150 | 871 | 339 |
| 383 | Quality of life | 1 | 150 | 2,150 | 1,156 |
| 385 | calcification | 5 | 149 | 352 | 399 |
| 386 | Transnational corporations | 4 | 148 | 284 | 256 |
| 387 | Aging | 5 | 147 | 1,803 | 1,651 |
| 388 | Endocrine glands | 1 | 146 | 436 | 351 |
| 389 | Psychology | 12 | 145 | 2,393 | 2,935 |
| 389 | Medical Technology | 5 | 145 | 1,113 | 1,097 |
| 389 | pollutants | 5 | 145 | 1,464 | 1,679 |
| 389 | biological factors | 14 | 145 | 802 | 1,379 |
| 393 | Antioxidants | 1 | 144 | 1,076 | 756 |
| 393 | vitamin C | 1 | 144 | 713 | 366 |
| 393 | vitamin E | 1 | 144 | 713 | 366 |
| 396 | infection | 6 | 142 | 978 | 1,187 |
| 397 | economic analysis | 1 | 141 | 495 | 156 |
| 397 | Exercise | 10 | 141 | 772 | 966 |
| 399 | Civil Engineering | 10 | 139 | 775 | 689 |
| 399 | human behavior | 5 | 139 | 1,774 | 2,240 |
| 399 | Metals | 9 | 139 | 1,176 | 1,437 |
| 402 | Structural optimization | 1 | 138 | 612 | 275 |
| 402 | Hydraulic Engineering | 7 | 138 | 553 | 599 |
| 404 | Latin America | 8 | 137 | 743 | 474 |
| 404 | Antarctica | 8 | 137 | 267 | 266 |
| 406 | NMR | 11 | 136 | 197 | 273 |
| 406 | Plants | 8 | 136 | 1,239 | 1,635 |
| 408 | Environmental Toxicology | 7 | 135 | 1,586 | 2,159 |
| 408 | biopolymers | 5 | 135 | 886 | 891 |
| 410 | Engineering Mathematics | 10 | 134 | 1,006 | 1,114 |
| 410 | Radio wave propagation | 6 | 134 | 496 | 416 |
| 412 | Neurobiology | 5 | 132 | 1,107 | 1,309 |
| 412 | Water pollution | 5 | 132 | 2,032 | 2,250 |
| 412 | Approximation Theory | 5 | 132 | 337 | 224 |
| 415 | Industrial Safety | 1 | 129 | 1,887 | 868 |
| 415 | Infections | 2 | 129 | 1,138 | 973 |
| 415 | Lipids | 2 | 129 | 1,402 | 1,117 |
| 418 | Neurotoxicology | 7 | 128 | 297 | 508 |
| 418 | Magnetic Materials | 3 | 128 | 1,478 | 1,205 |
| 420 | Behavioral Genetics | 4 | 127 | 193 | 239 |
| 420 | Money | 2 | 127 | 472 | 343 |
| 422 | international trade | 14 | 126 | 183 | 484 |
| 423 | Shock Waves | 9 | 125 | 62 | 93 |
| 423 | Wind power | 2 | 125 | 379 | 156 |
| 425 | Reading | 2 | 123 | 693 | 462 |
| 426 | Multimedia Systems | 5 | 122 | 1,427 | 1,280 |
| 426 | Oligosaccharides | 7 | 122 | 110 | 182 |
| 428 | Geographic information systems | 4 | 121 | 993 | 736 |
| 429 | Pharmacognosy | 4 | 118 | 1,576 | 1,736 |
| 430 | Chemical analysis | 4 | 116 | 966 | 967 |
| 431 | Technological Innovations | 1 | 114 | 1,783 | 930 |
| 432 | Detectors | 2 | 113 | 1,762 | 1,241 |
| 433 | Health | 4 | 112 | 1,707 | 1,546 |
| 433 | Bioinformatics | 8 | 112 | 1,181 | 1,609 |
| 435 | Tribology | 7 | 111 | 746 | 899 |
| 435 | Analytical Biochemistry | 3 | 111 | 1,645 | 1,349 |
| 437 | Pharmacy | 6 | 110 | 1,372 | 1,651 |
| 437 | Homeostasis | 1 | 110 | 612 | 780 |
| 437 | Cell metabolism | 1 | 110 | 1,017 | 893 |
| 440 | Plant Pathology | 5 | 108 | 98 | 97 |
| 440 | Medical innovations | 2 | 108 | 993 | 1,121 |
| 442 | Geodesy | 3 | 106 | 765 | 596 |
| 443 | plant oils | 3 | 104 | 257 | 176 |
| 444 | Respiratory system | 2 | 102 | 631 | 531 |
| 444 | rare diseases | 1 | 102 | 848 | 502 |
| 446 | Mechanical Engineering | 12 | 101 | 1,286 | 1,631 |
| 446 | Greenhouse gases | 2 | 101 | 345 | 349 |
| 446 | Metallic Glasses | 2 | 101 | 553 | 385 |
| 446 | Telecommunication | 3 | 101 | 2,437 | 1,998 |
| 450 | Rock deformation | 3 | 100 | 194 | 217 |
| 450 | Light | 8 | 100 | 536 | 1,005 |
| 452 | environmental exposure | 3 | 99 | 1,868 | 1,901 |
| 453 | health planning | 7 | 97 | 1,456 | 1,770 |
| 454 | Cosmology | 6 | 96 | 437 | 535 |
| 454 | Magnetohydrodynamics | 1 | 96 | 354 | 196 |
| 454 | Infrared spectroscopy | 5 | 96 | 174 | 259 |
| 454 | Plastics | 3 | 96 | 1,641 | 1,332 |
| 454 | cell physiology | 1 | 96 | 1,732 | 1,423 |
| 454 | Semiconductor industry | 5 | 96 | 419 | 386 |
| 460 | Nanochemistry | 5 | 95 | 986 | 1,148 |
| 460 | Human physiology | 3 | 95 | 89 | 50 |
| 460 | medical education | 1 | 95 | 2,382 | 1,303 |
| 460 | magnetic resonance | 11 | 95 | 203 | 354 |
| 464 | nucleotides | 11 | 94 | 121 | 149 |
| 465 | income distribution | 1 | 93 | 316 | 177 |
| 465 | nuclear astrophysics | 5 | 93 | 378 | 460 |
| 467 | Macroeconomics | 6 | 89 | 223 | 284 |
| 467 | Environmental Geochemistry | 6 | 89 | 276 | 528 |
| 467 | Cell differentiation | 3 | 89 | 1,219 | 1,480 |
| 470 | Computational Chemistry | 5 | 88 | 507 | 676 |
| 470 | Plate Tectonics | 4 | 88 | 219 | 245 |
| 470 | isomerism | 4 | 88 | 252 | 253 |
| 470 | Soviet Union | 6 | 88 | 399 | 262 |
| 470 | Chirality | 4 | 88 | 252 | 253 |
| 475 | Documentation | 1 | 84 | 491 | 254 |
| 476 | Magnetic Resonance Imaging | 3 | 83 | 392 | 372 |
| 477 | Medical Microbiology | 3 | 82 | 1,769 | 2,044 |
| 477 | Organizational learning | 7 | 82 | 148 | 351 |
| 477 | vibration | 5 | 82 | 905 | 1,119 |
| 477 | micromechanics | 7 | 82 | 349 | 594 |
| 477 | Knowledge management | 7 | 82 | 108 | 254 |
| 477 | Adhesion | 1 | 82 | 1,202 | 593 |
| 477 | adhesives | 1 | 82 | 1,266 | 598 |
| 477 | Growth factors | 1 | 82 | 476 | 446 |
| 477 | Cytokine | 1 | 82 | 629 | 534 |
| 486 | Quantum electronics | 7 | 81 | 1,068 | 1,298 |
| 486 | Astrocytes | 2 | 81 | 498 | 627 |
| 488 | Structural dynamics | 5 | 80 | 746 | 1,137 |
| 488 | Mining Geology | 2 | 80 | 117 | 62 |
| 488 | Forecasting | 4 | 80 | 465 | 521 |
| 488 | Computational Fluid Dynamics | 2 | 80 | 781 | 620 |
| 492 | Mechatronics | 5 | 79 | 682 | 924 |
| 492 | Lipid metabolism | 1 | 79 | 680 | 524 |
| 492 | Lipid | 1 | 79 | 682 | 526 |
| 492 | Nervous system | 4 | 79 | 1,793 | 2,080 |
| 496 | Sports Psychology | 1 | 78 | 228 | 176 |
| 497 | Securities | 2 | 77 | 467 | 421 |
| 497 | plant molecular biology | 3 | 77 | 1,373 | 1,750 |
| 497 | stocks | 2 | 77 | 193 | 232 |
| 500 | Institutional Economics | 3 | 76 | 49 | 10 |
| 500 | Capitalism | 3 | 76 | 167 | 138 |
| 500 | North Africa | 3 | 76 | 163 | 28 |
| 503 | Computer Vision | 2 | 74 | 1,328 | 1,223 |
| 503 | foreign exchange | 5 | 74 | 244 | 428 |
| 505 | Electrical Engineering | 18 | 73 | 1,383 | 2,204 |
| 505 | Hydrogeology | 4 | 73 | 595 | 724 |
| 505 | Parasitology | 8 | 73 | 1,409 | 1,950 |
| 508 | Zoology | 3 | 72 | 2,341 | 1,995 |
| 508 | Linguistics | 14 | 72 | 582 | 1,032 |
| 508 | Islam | 1 | 72 | 860 | 286 |
| 508 | Structure-activity relationship | 3 | 72 | 228 | 293 |
| 508 | lasers | 8 | 72 | 1,389 | 1,802 |
| 513 | Geriatrics | 2 | 71 | 2,770 | 2,276 |
| 513 | Stochastic Processes | 15 | 71 | 286 | 787 |
| 515 | environmental indicators | 2 | 70 | 1,381 | 1,527 |
| 515 | Molecular evolution | 1 | 70 | 2,102 | 1,719 |
| 517 | Cybernetics | 9 | 69 | 905 | 1,616 |
| 517 | Gerontology | 2 | 69 | 2,062 | 1,518 |
| 517 | Food | 6 | 69 | 2,199 | 3,105 |
| 517 | Southeast Asia | 3 | 69 | 374 | 249 |
| 521 | Environmental Psychology | 1 | 68 | 661 | 583 |
| 521 | mathematical concepts | 4 | 68 | 338 | 309 |
| 523 | Longevity | 1 | 67 | 349 | 217 |
| 523 | rejuvenation | 1 | 67 | 270 | 187 |
| 525 | Adaptive control systems | 1 | 66 | 1,027 | 532 |
| 525 | Europe | 16 | 66 | 1,226 | 2,394 |
| 527 | Production Engineering | 4 | 65 | 1,713 | 1,756 |
| 527 | economic forecasting | 2 | 65 | 419 | 410 |
| 527 | particles | 2 | 65 | 1,289 | 1,107 |
| 527 | mammals | 3 | 65 | 969 | 942 |
| 527 | extraterrestrial environment | 7 | 65 | 323 | 538 |
| 527 | astronomical phenomena | 7 | 65 | 289 | 495 |
| 533 | Embryology | 3 | 64 | 1,203 | 1,472 |
| 533 | Photonics | 2 | 64 | 1,943 | 1,838 |
| 533 | Entropy | 8 | 64 | 627 | 1,074 |
| 533 | Proteome | 6 | 64 | 742 | 1,277 |
| 533 | France | 9 | 64 | 184 | 257 |
| 533 | Metallography | 2 | 64 | 990 | 909 |
| 539 | Neuropsychology | 2 | 63 | 2,284 | 2,114 |
| 539 | Radiation effects | 5 | 63 | 435 | 897 |
| 541 | Liquid Crystals | 7 | 62 | 603 | 638 |
| 541 | Environmental risk assessment | 4 | 62 | 291 | 441 |
| 541 | movement | 5 | 62 | 224 | 464 |
| 541 | Biomass | 3 | 62 | 698 | 1,036 |
| 545 | Nuclear Fusion | 2 | 61 | 659 | 500 |
| 545 | Oxidative stress | 1 | 61 | 1,292 | 1,351 |
| 545 | Cellular senescence | 1 | 61 | 619 | 767 |
| 545 | Wireless Communication Systems | 4 | 61 | 1,992 | 2,107 |
| 545 | Parasites | 7 | 61 | 1,028 | 1,557 |
| 545 | amino acids | 3 | 61 | 572 | 758 |
| 545 | Nonlinear systems | 3 | 61 | 617 | 631 |
| 552 | Data Mining | 3 | 60 | 1,078 | 1,176 |
| 552 | animals | 2 | 60 | 1,452 | 1,125 |
| 552 | Animal | 2 | 60 | 222 | 179 |
| 555 | Human Geography | 4 | 59 | 923 | 1,050 |
| 555 | Surface-Active Agents | 3 | 59 | 1,144 | 1,561 |
| 555 | food technology | 3 | 59 | 2,438 | 2,796 |
| 555 | Surface properties | 3 | 59 | 1,196 | 1,611 |
| 559 | Database Management | 4 | 58 | 650 | 828 |
| 559 | Exercise therapy | 4 | 58 | 359 | 438 |
| 561 | Genetic engineering | 4 | 57 | 1,614 | 2,132 |
| 561 | Adsorption | 2 | 57 | 287 | 254 |
| 561 | Molecular cloning | 4 | 57 | 1,170 | 1,514 |
| 561 | Genetic recombination | 4 | 57 | 1,148 | 1,502 |
| 561 | plasticity | 1 | 57 | 518 | 563 |
| 561 | Radioisotopes | 5 | 57 | 802 | 919 |
| 561 | Recombinant DNA | 4 | 57 | 1,210 | 1,556 |
| 568 | Plant genetic engineering | 2 | 55 | 996 | 1,142 |
| 568 | Reproduction | 2 | 55 | 2,091 | 1,988 |
| 568 | multimedia | 1 | 55 | 819 | 691 |
| 568 | Interactive multimedia | 1 | 55 | 962 | 764 |
| 572 | Computer Graphics | 5 | 54 | 1,322 | 1,725 |
| 572 | Plant Biotechnology | 1 | 54 | 1,256 | 961 |
| 572 | management | 8 | 54 | 2,149 | 3,426 |
| 575 | Sustainable Development | 2 | 53 | 2,480 | 2,586 |
| 575 | Operations Research | 7 | 53 | 1,499 | 2,147 |
| 575 | Combinatorial chemistry | 2 | 53 | 831 | 1,037 |
| 575 | Gene library | 2 | 53 | 104 | 160 |
| 579 | Heat Exchangers | 3 | 52 | 1,234 | 1,643 |
| 579 | Calorimetry | 8 | 52 | 688 | 1,314 |
| 579 | Thermal analysis | 8 | 52 | 688 | 1,314 |
| 582 | Ocean Engineering | 2 | 51 | 1,769 | 1,858 |
| 582 | miniaturization | 3 | 51 | 1,696 | 2,134 |
| 584 | Computational Complexity | 9 | 50 | 540 | 1,042 |
| 585 | Algebra | 6 | 49 | 1,133 | 1,078 |
| 585 | embryonic development | 1 | 49 | 663 | 549 |
| 585 | Trace elements | 2 | 49 | 363 | 493 |
| 588 | Simulation Methods | 3 | 48 | 1,037 | 1,221 |
| 588 | Optoelectronic devices | 3 | 48 | 1,008 | 867 |
| 588 | Finite Element Method | 5 | 48 | 226 | 412 |
| 588 | Radio waves | 2 | 48 | 968 | 1,023 |
| 588 | Japan | 3 | 48 | 1,786 | 1,808 |
| 593 | Groundwater | 3 | 47 | 571 | 787 |
| 593 | vascular diseases | 3 | 47 | 661 | 956 |
| 593 | Combinatorial analysis | 6 | 47 | 734 | 811 |
| 596 | Industrial Engineering | 3 | 46 | 1,745 | 2,111 |
| 596 | Environmental Law | 1 | 46 | 1,602 | 1,732 |
| 596 | labor | 1 | 46 | 641 | 351 |
| 596 | Imaging systems | 7 | 46 | 445 | 729 |
| 596 | working class | 1 | 46 | 344 | 283 |
| 601 | Seismology | 1 | 45 | 756 | 566 |
| 601 | Medicinal plants | 1 | 45 | 2,050 | 1,938 |
| 601 | Earthquake prediction | 1 | 45 | 114 | 43 |
| 601 | Earthquakes | 1 | 45 | 623 | 422 |
| 601 | Cognition | 6 | 45 | 1,177 | 1,845 |
| 606 | X-ray crystallography | 5 | 44 | 418 | 547 |
| 607 | Computer Engineering | 2 | 43 | 1,257 | 1,178 |
| 607 | Friction | 1 | 43 | 259 | 255 |
| 607 | sustainability | 1 | 43 | 1,469 | 1,391 |
| 607 | global environmental change | 1 | 43 | 1,254 | 1,296 |
| 607 | cohesion | 1 | 43 | 25 | 36 |
| 607 | optical devices | 1 | 43 | 827 | 611 |
| 613 | Signal Transduction | 2 | 42 | 1,434 | 1,724 |
| 613 | Fracture mechanics | 3 | 42 | 1,319 | 1,577 |
| 613 | Mycology | 1 | 42 | 2,047 | 1,758 |
| 613 | Fungi | 1 | 42 | 1,434 | 1,328 |
| 617 | Education | 7 | 41 | 2,397 | 3,304 |
| 617 | Philosophy | 4 | 41 | 1,319 | 1,013 |
| 617 | Biogeography | 2 | 41 | 1,105 | 1,422 |
| 617 | Clinical Pharmacology | 1 | 41 | 1,637 | 1,438 |
| 621 | Urban Geography | 1 | 40 | 423 | 340 |
| 621 | Insects | 1 | 40 | 2,054 | 1,538 |
| 621 | Autonomous robots | 1 | 40 | 330 | 331 |
| 624 | Microbial Ecology | 2 | 39 | 2,221 | 2,879 |
| 624 | solar power | 2 | 39 | 1,005 | 1,329 |
| 624 | hazard mitigation | 2 | 39 | 1,221 | 1,465 |
| 624 | Porous materials | 3 | 39 | 804 | 934 |
| 624 | solar cells | 2 | 39 | 1,072 | 1,399 |
| 624 | Cheminformatics | 3 | 39 | 315 | 586 |
| 624 | venom | 7 | 39 | 406 | 1,069 |
| 624 | Toxins | 7 | 39 | 464 | 1,178 |
| 632 | Political Science | 4 | 38 | 1,435 | 1,469 |
| 632 | Regional Planning | 2 | 38 | 1,680 | 1,737 |
| 632 | Biological Systems | 3 | 38 | 544 | 824 |
| 632 | Ecosystem management | 3 | 38 | 683 | 946 |
| 632 | Plant breeding | 1 | 38 | 1,228 | 1,058 |
| 632 | city planning | 2 | 38 | 1,858 | 1,936 |
| 638 | Social Choice Theory | 3 | 37 | 252 | 273 |
| 638 | Welfare Economics | 3 | 37 | 434 | 561 |
| 638 | Public Housing | 1 | 37 | 50 | 11 |
| 638 | Bifurcation Theory | 2 | 37 | 362 | 372 |
| 638 | mycoses | 1 | 37 | 1,119 | 1,130 |
| 638 | Bacterial infections | 1 | 37 | 1,184 | 1,233 |
| 638 | Vaccines | 1 | 37 | 2,196 | 2,019 |
| 645 | Energy Storage | 2 | 36 | 1,473 | 1,679 |
| 645 | Measurement | 4 | 36 | 1,203 | 1,759 |
| 645 | Harmonic Analysis | 3 | 36 | 149 | 265 |
| 645 | older people | 1 | 36 | 2,155 | 1,517 |
| 649 | Anthropology | 5 | 35 | 1,154 | 1,626 |
| 649 | Computer Science | 9 | 35 | 1,170 | 2,297 |
| 649 | Petroleum Engineering | 4 | 35 | 584 | 936 |
| 649 | Algorithms | 2 | 35 | 926 | 859 |
| 649 | Land use | 2 | 35 | 1,381 | 1,732 |
| 649 | land degradation | 2 | 35 | 653 | 923 |
| 649 | degradation | 2 | 35 | 653 | 923 |
| 656 | Social Networks | 2 | 34 | 422 | 542 |
| 656 | Nuclear Chemistry | 2 | 34 | 1,285 | 1,136 |
| 656 | Radiochemistry | 1 | 34 | 1,539 | 1,039 |
| 656 | Online social networks | 2 | 34 | 400 | 473 |
| 656 | Coral reef biology | 2 | 34 | 376 | 525 |
| 656 | Geobiology | 2 | 34 | 519 | 709 |
| 656 | atmosphere | 3 | 34 | 750 | 1,196 |
| 663 | Physical Therapy | 1 | 33 | 1,744 | 1,593 |
| 663 | Materials Engineering | 4 | 33 | 642 | 961 |
| 663 | Health Services Research | 1 | 33 | 2,253 | 1,972 |
| 663 | bioclimatology | 2 | 33 | 1,182 | 1,432 |
| 663 | Primary health care | 1 | 33 | 2,365 | 2,085 |
| 663 | Public Choice | 3 | 33 | 355 | 530 |
| 663 | Group decision making | 3 | 33 | 483 | 703 |
| 663 | Parasitic Diseases | 5 | 33 | 1,393 | 2,290 |
| 663 | Small Business | 1 | 33 | 1,152 | 1,328 |
| 663 | Peptide | 4 | 33 | 154 | 253 |
| 663 | Paleobotany | 1 | 33 | 319 | 304 |
| 663 | Vegetation dynamics | 1 | 33 | 298 | 294 |
| 663 | Decision making | 3 | 33 | 1,453 | 1,928 |
| 676 | Nuclear Medicine | 2 | 32 | 942 | 986 |
| 676 | Radiobiology | 1 | 32 | 1,478 | 1,399 |
| 678 | Psychiatry | 1 | 31 | 4,369 | 4,012 |
| 678 | Ecological Engineering | 1 | 31 | 1,105 | 1,305 |
| 678 | Kalman Filtering | 1 | 31 | 213 | 116 |
| 678 | Fluorescence spectroscopy | 2 | 31 | 283 | 348 |
| 682 | supercritical fluids | 1 | 30 | 686 | 748 |
| 682 | carbon monoxide | 2 | 30 | 460 | 836 |
| 682 | Psychophysiology | 3 | 30 | 2,263 | 3,035 |
| 682 | Aquatic ecology | 2 | 30 | 1,121 | 1,273 |
| 686 | Social Sciences | 1 | 29 | 4,810 | 3,668 |
| 686 | Graph Theory | 5 | 29 | 566 | 723 |
| 686 | Historic Preservation | 2 | 29 | 165 | 190 |
| 686 | Organizational change | 3 | 29 | 755 | 1,135 |
| 686 | Apoptosis | 1 | 29 | 528 | 608 |
| 686 | infrared radiation | 3 | 29 | 615 | 823 |
| 686 | neurotoxins | 1 | 29 | 528 | 608 |
| 686 | Multivariate Analysis | 3 | 29 | 571 | 763 |
| 686 | Neurotoxic agents | 1 | 29 | 528 | 608 |
| 686 | Leadership | 1 | 29 | 958 | 1,011 |
| 686 | organizational effectiveness | 3 | 29 | 445 | 738 |
| 686 | Nerve regeneration | 1 | 29 | 528 | 608 |
| 698 | Ophthalmology | 5 | 28 | 1,178 | 1,920 |
| 698 | Developmental Psychology | 1 | 28 | 1,534 | 1,424 |
| 698 | housing policy | 2 | 28 | 151 | 185 |
| 698 | Housing | 2 | 28 | 622 | 872 |
| 698 | human development | 1 | 28 | 1,245 | 1,275 |
| 703 | Sedimentology | 1 | 27 | 1,017 | 1,027 |
| 703 | geological modeling | 2 | 27 | 695 | 866 |
| 703 | Product life cycle | 1 | 27 | 552 | 593 |
| 703 | green products | 1 | 27 | 467 | 554 |
| 703 | electrocatalysis | 1 | 27 | 249 | 234 |
| 703 | biological invasions | 2 | 27 | 752 | 1,053 |
| 709 | Nuclear Engineering | 3 | 26 | 1,380 | 1,621 |
| 709 | Nanomedicine | 1 | 26 | 510 | 628 |
| 709 | Telecommunication Systems | 4 | 26 | 1,454 | 1,973 |
| 709 | Chemical Ecology | 2 | 26 | 628 | 951 |
| 709 | Information Retrieval | 1 | 26 | 823 | 805 |
| 709 | Rheology | 1 | 26 | 907 | 876 |
| 709 | Water quality management | 2 | 26 | 2,132 | 2,482 |
| 709 | Luminescence | 2 | 26 | 1,650 | 1,840 |
| 709 | pheromones | 2 | 26 | 578 | 911 |
| 709 | Evolution equations | 4 | 26 | 122 | 212 |
| 709 | recreation | 3 | 26 | 689 | 906 |
| 720 | particle accelerators | 1 | 25 | 193 | 200 |
| 720 | Diagnosis | 2 | 25 | 470 | 653 |
| 720 | Drying | 1 | 25 | 680 | 696 |
| 720 | Financial Institutions | 1 | 25 | 742 | 695 |
| 720 | Osteoporosis | 2 | 25 | 430 | 618 |
| 720 | particle beams | 1 | 25 | 187 | 194 |
| 720 | Bone diseases | 2 | 25 | 552 | 819 |
| 727 | Sociology | 1 | 24 | 4,148 | 3,728 |
| 727 | Ethics | 1 | 24 | 1,540 | 1,333 |
| 727 | Thermodynamics | 1 | 24 | 1,898 | 1,498 |
| 727 | Quality Control | 1 | 24 | 2,623 | 2,678 |
| 727 | Thermochemistry | 1 | 24 | 772 | 773 |
| 727 | locomotion | 2 | 24 | 751 | 1,038 |
| 727 | posture | 2 | 24 | 751 | 1,038 |
| 727 | foods | 1 | 24 | 286 | 340 |
| 727 | Water chemistry | 2 | 24 | 486 | 728 |
| 727 | gait | 2 | 24 | 751 | 1,038 |
| 727 | walking | 2 | 24 | 751 | 1,038 |
| 738 | industrial hygiene | 1 | 23 | 1,704 | 1,293 |
| 738 | Research Design | 3 | 23 | 1,087 | 1,678 |
| 738 | Fractional Calculus | 2 | 23 | 210 | 308 |
| 738 | Environmentalism | 1 | 23 | 297 | 388 |
| 738 | Formal Languages | 4 | 23 | 248 | 341 |
| 738 | insurance | 5 | 23 | 274 | 598 |
| 738 | Development | 4 | 23 | 664 | 1,391 |
| 738 | Economic Assistance | 4 | 23 | 573 | 1,304 |
| 738 | world | 4 | 23 | 585 | 1,421 |
| 747 | Hematology | 2 | 22 | 1,747 | 2,144 |
| 747 | Nuclear Energy | 2 | 22 | 1,166 | 1,233 |
| 747 | Systems Biology | 2 | 22 | 1,606 | 2,297 |
| 747 | Ion Exchange | 1 | 22 | 219 | 205 |
| 747 | machinery | 1 | 22 | 1,310 | 1,240 |
| 747 | Solvent extraction | 1 | 22 | 219 | 205 |
| 747 | commerce | 1 | 22 | 2,404 | 2,273 |
| 747 | Soil ecology | 2 | 22 | 937 | 1,446 |
| 755 | Production Planning | 1 | 21 | 556 | 730 |
| 755 | Tourism | 3 | 21 | 1,653 | 2,617 |
| 755 | Production Control | 1 | 21 | 537 | 727 |
| 755 | Radio | 2 | 21 | 1,531 | 1,847 |
| 755 | Forest genetics | 1 | 21 | 497 | 493 |
| 760 | Biosensors | 1 | 20 | 1,782 | 2,270 |
| 760 | Health Education | 2 | 20 | 2,031 | 2,459 |
| 760 | Radiopharmaceuticals | 3 | 20 | 286 | 350 |
| 760 | Liposomes | 2 | 20 | 742 | 1,006 |
| 760 | Bioelectronics | 1 | 20 | 1,593 | 2,069 |
| 760 | Lipid bilayers | 2 | 20 | 615 | 814 |
| 760 | sports administration | 1 | 20 | 607 | 637 |
| 760 | cosmetics | 2 | 20 | 213 | 405 |
| 768 | Animal Behavior | 1 | 19 | 2,347 | 2,640 |
| 768 | Boundary Value Problems | 1 | 19 | 1,258 | 1,144 |
| 768 | Child | 1 | 19 | 2,875 | 2,832 |
| 768 | Ethology | 1 | 19 | 1,889 | 2,208 |
| 768 | Turbulence | 3 | 19 | 235 | 418 |
| 768 | Sound | 1 | 19 | 1,574 | 1,368 |
| 768 | Biomolecules | 1 | 19 | 784 | 993 |
| 768 | biological agents | 5 | 19 | 520 | 712 |
| 768 | Ultrasound | 1 | 19 | 1,076 | 1,219 |
| 768 | Radio frequency | 1 | 19 | 697 | 814 |
| 768 | children | 1 | 19 | 803 | 825 |
| 779 | Software Engineering | 1 | 18 | 1,456 | 1,450 |
| 779 | Logic | 3 | 18 | 479 | 588 |
| 779 | Industrial Sociology | 1 | 18 | 298 | 397 |
| 779 | Functional equations | 2 | 18 | 297 | 283 |
| 779 | Cognitive Science | 2 | 18 | 1,862 | 2,543 |
| 779 | Chromosome mapping | 2 | 18 | 1,832 | 2,628 |
| 779 | Body Image | 1 | 18 | 378 | 549 |
| 779 | Matroids | 1 | 18 | 406 | 413 |
| 779 | Chemical reactors | 1 | 18 | 376 | 212 |
| 779 | gene mapping | 2 | 18 | 1,963 | 2,810 |
| 789 | Histology | 2 | 17 | 1,848 | 2,516 |
| 789 | Ergonomics | 2 | 17 | 1,074 | 1,449 |
| 789 | Heterocyclic chemistry | 4 | 17 | 440 | 868 |
| 789 | Bioremediation | 1 | 17 | 1,516 | 1,812 |
| 789 | Water quality | 1 | 17 | 544 | 670 |
| 789 | Crisis management | 2 | 17 | 189 | 356 |
| 789 | Public Finance | 2 | 17 | 258 | 326 |
| 789 | Plant hormones | 1 | 17 | 599 | 805 |
| 789 | RNA | 2 | 17 | 576 | 983 |
| 789 | wood | 1 | 17 | 771 | 775 |
| 789 | Stress | 1 | 17 | 570 | 736 |
| 789 | Southern states | 1 | 17 | 553 | 476 |
| 801 | Planetary Science | 4 | 16 | 411 | 784 |
| 801 | Public Administration | 1 | 16 | 2,033 | 1,875 |
| 801 | Human-Computer Interaction | 1 | 16 | 2,344 | 2,555 |
| 801 | visualization | 5 | 16 | 1,067 | 1,472 |
| 801 | Textile industry | 1 | 16 | 847 | 763 |
| 806 | Intelligent Transportation Systems | 2 | 15 | 1,279 | 1,892 |
| 806 | Ethnobotany | 1 | 15 | 348 | 567 |
| 806 | epilepsy | 2 | 15 | 976 | 1,435 |
| 806 | Combinatorial optimization | 2 | 15 | 695 | 826 |
| 806 | Queuing Theory | 2 | 15 | 208 | 297 |
| 806 | Drug targeting | 3 | 15 | 294 | 884 |
| 806 | Medical Anthropology | 1 | 15 | 1,723 | 2,170 |
| 806 | Human evolution | 2 | 15 | 494 | 837 |
| 806 | Traditional medicine | 1 | 15 | 387 | 615 |
| 806 | Child psychology | 1 | 15 | 1,926 | 2,177 |
| 806 | ethnobiology | 1 | 15 | 458 | 642 |
| 806 | forestry | 2 | 15 | 277 | 506 |
| 806 | Parkinson's disease | 1 | 15 | 420 | 565 |
| 806 | Phytotherapy | 1 | 15 | 1,232 | 1,555 |
| 806 | Maps | 2 | 15 | 206 | 381 |
| 806 | Ethnomedicine | 1 | 15 | 348 | 566 |
| 822 | Soil Mechanics | 2 | 14 | 1,190 | 1,577 |
| 822 | Rock Mechanics | 2 | 14 | 990 | 1,374 |
| 822 | Microcirculation | 2 | 14 | 549 | 915 |
| 822 | Blood vessels | 2 | 14 | 465 | 794 |
| 822 | drug toxicity | 1 | 14 | 948 | 1,298 |
| 822 | enzymes | 2 | 14 | 1,620 | 2,356 |
| 822 | sports injuries | 1 | 14 | 928 | 1,032 |
| 829 | Mining Engineering | 1 | 13 | 861 | 891 |
| 829 | Visual Communication | 1 | 13 | 849 | 930 |
| 829 | Cryptography | 1 | 13 | 1,143 | 962 |
| 829 | Comparative Physiology | 1 | 13 | 1,111 | 1,391 |
| 829 | Food Preservation | 1 | 13 | 1,353 | 1,484 |
| 829 | Evolutionary economics | 1 | 13 | 338 | 396 |
| 829 | Microbial Biotechnology | 1 | 13 | 1,701 | 2,081 |
| 829 | Thrombosis | 1 | 13 | 1,215 | 1,471 |
| 829 | Thin Films | 4 | 13 | 438 | 979 |
| 829 | Quality Assurance | 2 | 13 | 452 | 848 |
| 829 | Alternative Medicine | 1 | 13 | 2,330 | 2,784 |
| 829 | Image enhancement | 1 | 13 | 684 | 835 |
| 829 | complementary therapies | 1 | 13 | 2,591 | 2,986 |
| 829 | food contamination | 1 | 13 | 1,746 | 1,952 |
| 829 | Teaching | 1 | 13 | 2,642 | 2,682 |
| 829 | Communication | 2 | 13 | 2,382 | 3,020 |
| 829 | Social behavior | 1 | 13 | 1,735 | 1,974 |
| 829 | genome | 2 | 13 | 1,554 | 2,406 |
| 829 | Behavior | 2 | 13 | 3,118 | 4,414 |
| 829 | Population Dynamics | 1 | 13 | 360 | 470 |
| 849 | computer networks | 4 | 12 | 2,079 | 3,376 |
| 850 | Origin of life | 1 | 11 | 267 | 367 |
| 850 | drug resistance | 1 | 11 | 1,192 | 1,600 |
| 850 | Law and Economics | 2 | 11 | 397 | 553 |
| 850 | reasoning | 1 | 11 | 814 | 882 |
| 850 | Sulfur | 2 | 11 | 148 | 291 |
| 850 | inscriptions | 1 | 11 | 99 | 85 |
| 850 | disabilities | 1 | 11 | 1,094 | 1,377 |
| 850 | Urban Areas | 1 | 11 | 471 | 586 |
| 850 | Organelle biogenesis | 1 | 11 | 396 | 504 |
| 850 | Fuzzy systems | 1 | 11 | 2,553 | 2,582 |
| 860 | Kinesiology | 1 | 10 | 336 | 519 |
| 860 | Food Science | 1 | 10 | 500 | 656 |
| 860 | Mathematical Economics | 2 | 10 | 384 | 551 |
| 860 | Number Theory | 2 | 10 | 1,003 | 1,165 |
| 860 | Discrete Mathematics | 2 | 10 | 506 | 542 |
| 860 | Wetland ecology | 2 | 10 | 595 | 1,109 |
| 860 | Entrepreneurship | 1 | 10 | 1,619 | 2,095 |
| 860 | Wetland conservation | 2 | 10 | 418 | 875 |
| 860 | Communism | 1 | 10 | 300 | 326 |
| 860 | graph | 2 | 10 | 506 | 542 |
| 860 | Electrons | 1 | 10 | 174 | 202 |
| 860 | Wetlands | 2 | 10 | 431 | 880 |
| 872 | Anatomy | 1 | 9 | 2,468 | 2,772 |
| 872 | Geriatric Medicine | 1 | 9 | 324 | 521 |
| 872 | Radio Astronomy | 2 | 9 | 12 | 16 |
| 872 | Environmental Economics | 1 | 9 | 775 | 976 |
| 872 | air quality management | 1 | 9 | 983 | 1,472 |
| 872 | Distributed Databases | 1 | 9 | 311 | 406 |
| 872 | Scheduling | 1 | 9 | 280 | 416 |
| 872 | Production Scheduling | 1 | 9 | 280 | 416 |
| 872 | water resources | 4 | 9 | 192 | 390 |
| 872 | indoor air pollution | 1 | 9 | 698 | 1,027 |
| 872 | Ventilation | 1 | 9 | 920 | 1,203 |
| 872 | Sick building syndrome | 1 | 9 | 698 | 1,027 |
| 884 | Pharmacokinetics | 1 | 8 | 1,249 | 1,733 |
| 884 | income | 1 | 8 | 331 | 458 |
| 884 | Input-output analysis | 1 | 8 | 445 | 592 |
| 884 | Wealth | 1 | 8 | 331 | 458 |
| 884 | Antibodies | 1 | 8 | 785 | 1,038 |
| 884 | Invertebrates | 2 | 8 | 757 | 1,377 |
| 884 | Antigens | 1 | 8 | 962 | 1,255 |
| 884 | heredity | 1 | 8 | 1,015 | 1,283 |
| 884 | Testing | 1 | 8 | 174 | 253 |
| 893 | Nutrition | 4 | 7 | 3,049 | 5,247 |
| 893 | Information Technology | 2 | 7 | 2,904 | 4,030 |
| 893 | International Relations | 20 | 7 | 340 | 1,542 |
| 893 | Logistics | 4 | 7 | 479 | 1,402 |
| 893 | Remote Sensing | 2 | 7 | 1,771 | 2,452 |
| 893 | Underwater acoustics | 1 | 7 | 159 | 188 |
| 893 | Soil fertility | 1 | 7 | 553 | 861 |
| 893 | psychophysics | 1 | 7 | 578 | 719 |
| 893 | Moon | 2 | 7 | 186 | 350 |
| 893 | personality | 2 | 7 | 1,662 | 2,576 |
| 893 | Methodology | 1 | 7 | 1,002 | 1,226 |
| 893 | Administration | 1 | 7 | 175 | 304 |
| 893 | Population | 2 | 7 | 1,040 | 1,885 |
| 893 | food industry | 1 | 7 | 1,419 | 1,853 |
| 893 | infrared technology | 1 | 7 | 377 | 402 |
| 908 | Polymer Engineering | 2 | 6 | 156 | 483 |
| 908 | Industrial Organization | 2 | 6 | 402 | 809 |
| 908 | Power Electronics | 1 | 6 | 1,390 | 1,745 |
| 908 | Computer Architecture | 2 | 6 | 683 | 1,087 |
| 908 | Quantum Mechanics | 1 | 6 | 361 | 379 |
| 908 | Family | 1 | 6 | 1,502 | 2,016 |
| 908 | families | 1 | 6 | 1,378 | 1,714 |
| 908 | plasma spraying | 1 | 6 | 411 | 650 |
| 908 | Alloys | 1 | 6 | 604 | 652 |
| 908 | Spectral Imaging | 1 | 6 | 20 | 34 |
| 908 | DNA | 1 | 6 | 993 | 1,352 |
| 908 | carbonate rocks | 3 | 6 | 138 | 414 |
| 908 | Leisure | 1 | 6 | 586 | 943 |
| 908 | Insect biochemistry | 1 | 6 | 730 | 1,054 |
| 922 | Musicology | 1 | 5 | 421 | 474 |
| 922 | Optical Communications | 1 | 5 | 1,243 | 1,560 |
| 922 | Music | 1 | 5 | 1,399 | 1,562 |
| 922 | Risk assessment | 2 | 5 | 825 | 1,778 |
| 922 | Immunochemistry | 1 | 5 | 1,369 | 1,855 |
| 922 | Political Parties | 1 | 5 | 368 | 524 |
| 922 | Edible plants | 3 | 5 | 201 | 913 |
| 922 | Ethnology | 2 | 5 | 1,749 | 2,534 |
| 922 | industrial relations | 2 | 5 | 1,025 | 1,739 |
| 922 | archaeological dating | 2 | 5 | 8 | 19 |
| 922 | electroplating | 1 | 5 | 97 | 95 |
| 922 | school sports | 1 | 5 | 228 | 387 |
| 922 | viruses | 1 | 5 | 1,632 | 2,253 |
| 922 | surface preparation | 1 | 5 | 78 | 88 |
| 922 | Education history | 2 | 5 | 115 | 233 |
| 922 | Yeast | 1 | 5 | 694 | 1,012 |
| 922 | motor skills | 1 | 5 | 417 | 635 |
| 939 | Nondestructive testing | 1 | 4 | 1,101 | 1,491 |
| 939 | Product Design | 1 | 4 | 801 | 1,076 |
| 939 | Microbial Genetics | 1 | 4 | 626 | 981 |
| 939 | Radiation Protection | 1 | 4 | 1,039 | 1,257 |
| 939 | Geothermal Energy | 1 | 4 | 478 | 809 |
| 939 | Transportation | 1 | 4 | 2,264 | 2,903 |
| 939 | Geochemical Modeling | 1 | 4 | 386 | 605 |
| 939 | Quantum Communication | 1 | 4 | 327 | 517 |
| 939 | Molecular Imaging | 2 | 4 | 595 | 1,059 |
| 939 | Quantum Optics | 1 | 4 | 1,283 | 1,599 |
| 939 | Yoga | 1 | 4 | 58 | 119 |
| 939 | phytopathogenic bacteria | 1 | 4 | 407 | 667 |
| 939 | Semigroups | 1 | 4 | 560 | 636 |
| 939 | ozone | 1 | 4 | 270 | 548 |
| 939 | Cerebellum | 1 | 4 | 504 | 776 |
| 939 | Protein engineering | 1 | 4 | 371 | 628 |
| 939 | antibiotics | 1 | 4 | 442 | 805 |
| 939 | molecular design | 2 | 4 | 288 | 639 |
| 939 | Consciousness | 2 | 4 | 598 | 1,085 |
| 939 | Cerebellar ataxia | 1 | 4 | 504 | 776 |
| 959 | Language Disorders | 1 | 3 | 1,183 | 1,609 |
| 959 | Children's Literature | 1 | 3 | 204 | 275 |
| 959 | Discourse Analysis | 3 | 3 | 380 | 1,028 |
| 959 | Demography | 1 | 3 | 1,031 | 1,483 |
| 959 | Applied Linguistics | 1 | 3 | 1,029 | 1,313 |
| 959 | Phonetics | 1 | 3 | 534 | 801 |
| 959 | diffusion | 3 | 3 | 332 | 610 |
| 959 | Genetic translocation | 2 | 3 | 256 | 632 |
| 959 | Industrial Policy | 2 | 3 | 618 | 1,214 |
| 959 | Speech Disorders | 1 | 3 | 1,334 | 1,776 |
| 959 | lexicology | 2 | 3 | 20 | 36 |
| 959 | plasmids | 2 | 3 | 256 | 632 |
| 959 | internet | 1 | 3 | 2,348 | 3,064 |
| 959 | plankton | 1 | 3 | 371 | 594 |
| 959 | Steroids | 1 | 3 | 1,293 | 1,852 |
| 959 | World Wide Web | 1 | 3 | 836 | 1,265 |
| 975 | Fiction | 2 | 2 | 164 | 287 |
| 975 | Phytochemistry | 1 | 2 | 642 | 1,170 |
| 975 | behavioral medicine | 1 | 2 | 1,866 | 2,808 |
| 975 | Ecocriticism | 1 | 2 | 65 | 101 |
| 975 | Crystallization | 1 | 2 | 800 | 1,125 |
| 975 | Immunopharmacology | 1 | 2 | 1,519 | 2,186 |
| 975 | Lattice Theory | 1 | 2 | 389 | 496 |
| 975 | Superconductors | 1 | 2 | 1,220 | 1,558 |
| 975 | Phytoremediation | 1 | 2 | 642 | 1,170 |
| 975 | environmental remediation | 1 | 2 | 765 | 1,344 |
| 975 | motor learning | 1 | 2 | 44 | 97 |
| 975 | Bioreactors | 1 | 2 | 642 | 1,170 |
| 975 | Superconductivity | 1 | 2 | 710 | 998 |
| 975 | movement disorders | 1 | 2 | 44 | 97 |
| 975 | Organometallic compounds | 1 | 2 | 1,848 | 2,427 |
| 975 | Diet | 1 | 2 | 2,516 | 3,497 |
| 975 | health services | 1 | 2 | 1,631 | 2,418 |
| 975 | Emotions | 1 | 2 | 912 | 1,411 |
| 993 | Law | 1 | 1 | 1,854 | 2,257 |
| 993 | History | 1 | 1 | 1,494 | 1,483 |
| 993 | Mathematics Education | 1 | 1 | 837 | 1,184 |
| 993 | Economic Geography | 1 | 1 | 644 | 1,001 |
| 993 | Historical Linguistics | 1 | 1 | 175 | 265 |
| 993 | Systems Analysis | 2 | 1 | 1,431 | 2,688 |
| 993 | Nonverbal Communication | 1 | 1 | 374 | 668 |
| 993 | Agricultural Biotechnology | 1 | 1 | 595 | 889 |