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      Listed below are the titles of the main classes, classified by Library of Congress Classification by LOC.

      Technology and Engineering

    • Communication
    • Architecture
    • Artificial Intelligence
    • Computer software and applications
    • Computing Bioinformatics
    • Biotechnology
    • Data Mining
    • Energy Engineering Forestry
    • Internet and World Wide Web
    • Information Technology
    • Nanotechnology and Smart Materials
    • Renewable Energy
    • Robotics
    • Systems Engineering

      Agriculture

    • Agriculture
    • Plant culture
    • Forestry
    • Animal culture

      Medicine

    • Medicine
    • HIV/AIDS

      Geography. Anthropology. Recreation

    • Geography
    • Mathematical geography. Cartography
    • Physical geography
    • Oceanography
    • Environmental Sciences
    • Human ecology. Anthropogeography
    • Anthropology

      Fine Arts

    • Visual arts
    • Architecture
    • Sculpture
    • Drawing Design Illustration
    • Decorative arts
    • Arts in general

      Philosophy

    • Philosophy

      Auxiliary Sciences Of History

    • Auxiliary Sciences of History

      History Of The Americas

    • History Of The Americas

      Political Science

    • Political Science

      Law

    • Law in general

      • Science

    • Mathematics
    • Astronomy
    • Physics
    • Chemistry
    • Geology
    • Botany
    • Zoology
    • Human anatomy
    • Physiology
    • Microbiology

      Education

    • Education in general
    • e-learning
    • m-learning
    • u-learning

      Language And Literature

    • Language And Literature
    • Language learning

      Social Sciences

    • Social sciences
    • Statistics
    • Economic theory and history
    • Transportation and communications
    • Finance
    • Sociology
    • Socialism Communism Anarchism

      World History

    • History
    • Europe
    • Asia
    • Africa
    • Oceania (South Seas)

      Music And Books On Music

    • Music in general

      Military Science

    • Military Science

      Naval Science

    • Naval Science

      Bibliography

    • Bibliography

      General Works

    • General Works