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 |

515.0 > 268 | 515.1 Orthogonal projections on 2 planes 156 | 515.2 Isometric and analogous projections 639 | 515.3 Oblique projection 2,829 | 515.4 Conic projection 419 | 515.5 Special Functions 197 | 515.6 Other Methods 514 | 515.7 Functional Analysis 1,499 | 515.8 Stereotomy 215 | 515.9 Complex Analysis 627 i |

515.10 6 | 515.11 Straight lines; Planes | 515.12 Single curved lines 2 | 515.13 Double curvd lines 4 | 515.14 Single curvd surfaces 17 | 515.15 Double curvd surfaces 91 | 515.16 Surfaces of revolution 5 | 515.17 Warpt surfaces | 515.18 Intersections of surfaces | 515.19 1 |