0 Information 196,271 âšī¸ | 1 Philosophy and Psychology 182,817 đ | 2 Religion 463,618 đđŊ | 3 Social Sciences 1,017,722 đĢ | 4 Language 130,463 đŦ | 5 Mathematics and Science 322,970 đŦ | 6 Technology 751,858 đĄ | 7 Arts and Recreation 695,836 đ¨ | 8 Literature 929,792 đ | 9 Biography and History 592,368 đŋ |

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

510 General Mathematics 15,018 â | 511 General Principles 5,344 đ | 512 Algebra 7,899 + | 513 Arithmetic 4,632 đĸ | 514 Trigonometry; topology 1,546 đŠ | 515 Analysis 9,673 ÎŖ | 516 Algebraic geometry 4,709 V | 517 Calculus 900 âĢ | 518 Numerical analysis 639 đģ | 519 Applied Mathematics, Probabilities 11,584 đ |

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 |

512.20 8 | 512.21 Equations, 1st to 4th degrees 13 | 512.22 Higher numeric equations 125 | 512.23 Indeterminate equations; Diophantin analysis 34 | 512.24 Imaginary expressions 83 | 512.25 15 | 512.26 2 | 512.27 14 | 512.28 1 | 512.29 |