| 00—General | 1,240 |
| 01—History and biography | 736 |
| 03—Mathematical logic and foundations | 3,882 |
| 05—Combinatorics | 4,871 |
| 06—Order, lattices, ordered algebraic structures | 452 |
| 08—General algebraic systems | 390 |
| 11—Number theory | 5,165 |
| 12—Field theory and polynomials | 308 |
| 13—Commutative rings and algebras | 1,228 |
| 14—Algebraic geometry | 4,199 |
| 15—Linear and multilinear algebra; matrix theory | 755 |
| 16—Associative rings and algebras | 1,731 |
| 17—Nonassociative rings and algebras | 799 |
| 18—Category theory, homological algebra | 884 |
| 19—K-theory | 266 |
| 20—Group theory and generalizations | 3,641 |
| 22—Topological groups, Lie groups | 700 |
| 26—Real functions | 502 |
| 28—Measure and integration | 356 |
| 30—Functions of a complex variable | 1,390 |
| 31—Potential theory | 189 |
| 32—Several complex variables and analytic spaces | 828 |
| 33—Special functions | 289 |
| 34—Ordinary differential equations | 1,994 |
| 35—Partial differential equations | 6,999 |
| 37—Dynamical systems and ergodic theory | 3,044 |
| 39—Finite differences and functional equations | 252 |
| 40—Sequences, series, summability | 235 |
| 41—Approximations and expansions | 890 |
| 42—Fourier analysis | 988 |
| 43—Abstract harmonic analysis | 352 |
| 44—Integral transforms, operational calculus | 115 |
| 45—Integral equations | 231 |
| 46—Functional analysis | 3,656 |
| 47—Operator theory | 1,632 |
| 49—Calculus of variations and optimal control | 1,330 |
| 51—Geometry | 1,424 |
| 52—Convex and discrete geometry | 855 |
| 53—Differential geometry | 3,750 |
| 54—General topology | 1,059 |
| 55—Algebraic topology | 1,605 |
| 57—Manifolds and cell complexes | 1,518 |
| 58—Global analysis, analysis on manifolds | 768 |
| 60—Probability theory and stochastic processes | 7,607 |
| 62—Statistics | 17,731 |
| 65—Numerical analysis | 8,139 |
| 68—Computer science | 34,944 |
| 70—Mechanics of particles and systems | 1,112 |
| 74—Mechanics of deformable solids | 2,286 |
| 76—Fluid mechanics | 4,366 |
| 78—Optics, electromagnetic theory | 1,743 |
| 80—Classical thermodynamics, heat transfer | 379 |
| 81—Quantum Theory | 4,273 |
| 82—Statistical mechanics, structure of matter | 2,088 |
| 83—Relativity and gravitational theory | 1,700 |
| 85—Astronomy and astrophysics | 2,591 |
| 86—Geophysics | 1,396 |
| 90—Operations research, mathematical programming | 6,167 |
| 91—Game theory, economics, social and behavioral sciences | 20,293 |
| 92—Biology and other natural sciences | 5,593 |
| 93—Systems theory; control | 3,895 |
| 94—Information and communication, circuits | 5,408 |
| 97—Mathematics education | 3,283 |