0 Information 196,271 βΉοΈ | 1 Philosophy and Psychology 182,817 π | 2 Religion 463,618 ππ½ | 3 Social Sciences 1,017,722 π« | 4 Language 130,463 π¬ | 5 Mathematics and Science 322,970 π¬ | 6 Technology 751,858 π‘ | 7 Arts and Recreation 695,836 π¨ | 8 Literature 929,792 π | 9 Biography and History 592,368 πΏ |

50 General Science 24,934 π¬ | 51 Mathematics 61,944 β | 52 Astronomy 17,388 π | 53 Physics 34,172 π | 54 Chemistry 22,053 β | 55 Earth sciences & geology 28,173 π | 56 Fossils & prehistoric life 6,394 π | 57 Life Sciences 45,977 π | 58 Botany 17,698 πΏ | 59 Zoology 64,237 πΌ |

510 General Mathematics 15,018 β | 511 General Principles 5,344 π | 512 Algebra 7,899 + | 513 Arithmetic 4,632 π’ | 514 Trigonometry; topology 1,546 π© | 515 Analysis 9,673 Ξ£ | 516 Algebraic geometry 4,709 V | 517 Calculus 900 β« | 518 Numerical analysis 639 π» | 519 Applied Mathematics, Probabilities 11,584 π |

512.0 379 | 512.1 Systems of algebra 310 | 512.2 Numeric equations; Imaginary expressions 857 | 512.3 Algebraic equations; Maxima and minima 158 | 512.4 Series; Fractions; Binomial theorem; Taylor's theorem 460 | 512.5 Combinatory analysis 1,203 | 512.6 Proportion and progression 76 | 512.7 Involution and evolution 1,083 | 512.8 Higher algebra 563 | 512.9 Problems and tables 1,064 |

512.80 4 | 512.81 Theory of numbers (see 511.1 Systems of arithmetic) 178 | 512.82 Theory of equations; Complex variable (See also 517.8) 11 | 512.83 Determinants 2 | 512.84 Symmetric functions | 512.85 Elimination; eliminants and discriminants 1 | 512.86 Tansformations; Substitutions 88 | 512.87 Quantics 8 | 512.88 Invariants; Covariants; Contravariants 1 | 512.89 165 |

512.860 1 | 512.861 | 512.862 | 512.863 | 512.864 | 512.865 8 | 512.866 | 512.867 | 512.868 | 512.869 |