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Encyclopedia of Knowledge HandWiki

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HandWiki is a wiki encyclopedia for collaborative editing of articles on computing, science, technology and general knowledge. Registered users can post and edit articles, books, manuals and tutorials. Login or request account using the top-right menu. We strongly encourage editors to use their real names when writing original articles. Read more here.

News
  • May 10, 2026: Supported by KMF.
  • May 2, 2026: Added an Art portal.
  • Nov 1, 2025: Updated. Re-register!
  • Nov 1, 2024: Export articles to ZWI file formats
  • Nov 5, 2022: Included in EncycloReader
  • Apr 26, 2022: References can be imported from arXiv.org.
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Create and Share Knowledge

Unleash your ideas and turn them into knowledge. Create original, author-owned articles with a publish-first, review-later approach.

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Contribute to the world's knowledge. Create encyclopedic articles or import them from Wikipedia and similar wiki resources under the CC BY-SA license.

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Recent Pages
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    Did You Know?

    Carl Jung

    Synchronicity is a concept first introduced by psychologist Carl Jung to describe coincidences that appear meaningfully related yet lack a causal connection. Read more ..

    YouTube Designed World channel

    🔗 Designed World is a YouTube channel dedicated to unexplained phenomena and unusual observations. Read more ..
    Featured Learning Resources

    Technology: A visual story: What does it take to build a UFO? by the History Channel.

    Programing: The Definitive Guide to Jython. Python for the Java Platform.

    Software: DataMelt - a free software for numeric computation, mathematics and statistics.

    New books: The Designed World of Information: Unveiling the Incredible Realm Beyond (Genres: science; spirituality; religion).

    Read More
    Can you hold 70,000 books in one hand?
    If you are reading this blog, you are a certifiable smart person and probably know about Project Gutenberg (PG)... Read more

    Mathematics and Computer Science

    Here are articles on abstract concepts related to computing in a broad sense. Such topics unify foundations of mathematics with computations using computers, and can be applied to many branches of science, finance or technology. Mathematics is an essential tool in computing, but computers are used as a main tool in mathematical problem solving. These topics cover all branches of mathematics, statistics, computer science, data analysis, machine learning and information science.

    Mathematics

    Calculus, algebra, geometry, topology, logic, statistics and related topics
    Learn more.     [Add article]

    Data Analysis

    Analysis techniques, data mining, algorithms and visualization
    Learn more.     [Add article]

    Computer concepts

    Theory of calculations with computers, computer terms and programming languages
    Learn more.     [Add article]

    Natural and Formal Sciences

    The portals "Natural nd Formal Sciences" are dedicated to the study of natural phenomena and physical world.

    Astronomy

    Universe, celestial objects, cosmology, space science and exploration
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    Biology

    Studies of life and living organisms
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    Chemistry

    Composition, structure and properties of matter
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    Physics

    All about physical sciences and related
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    Earth

    Sciences about the planet Earth
    Learn more.     [Add article]

    Unsolved

    Unexplained problems and unusual observations
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    Humanities

    Here are the portals dedicated to the study of aspects of human society and culture. This group of topics includes arts, practices and procedures used to maintain state of physical, social and mental well-being.

    History

    Study of past events, chronological records and their interpretations
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    Philosophy

    Questions about existence, values, knowledge, reasons and mind
    Learn more.     [Add article]

    Social

    Topics related to social sciences and humanity
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    Art

    Topics related to art topics
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    Religion

    System of beliefs and wordviews that relate humanity to spirituality
    Learn more.     [Add article]

    Medicine

    Different areas of medical sciences, health and related
    Learn more.     [Add article]

    Places

    Various places, particular regions and centers of population
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    Technology, Tools and Finance

    Here are articles dedicated to various technology topics (building complex devices and machines), software (computer programs and operating systems) and finance (study of money and investments).

    Engineering

    Design and manufacturing of complex devices and machines
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    Software

    Computer programs and libraries organized by topics
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    Finance

    Finance, business, market and financial calculations
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    Companies, Organizations and People

    Here are articles about organizations, companies and people contributing to research and technology. They serve to support the citations in HandWiki's research articles and books.

    Organizations

    Organizations contributing to science and technology
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    Companies

    Companies contributing to science and technologies
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    Biographies

    Biographies of researches in science and technology
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    Original author-owned articles

    This portal contains original, author-owned articles through a "Publish First, Get Reviewed" approach. The articles are organized by subject areas.

    Authorized articles

    Scholarly articles organized across diverse subject areas → Learn more...     [Add]


    Books, Monographs, Manuals and Tutorials

    Here are books, monographs and tutorials. Books and manuals are organized as collections of articles, and typically span many wiki pages. A monograph discusses a detailed study of a single specialized subject. Monographs use a single wiki page.

    Books

    Online books on science, computations and technology
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    Monographs

    Monographs on science, computations and technologies
    Learn more.     [Add monograph]

    Tutorials

    Tutorials on science, computations and technologies
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    Manuals

    Manuals on science, computations and technologies
    Learn more.     [Add manual]

    Topical in-depth encyclopedias

    Here are in-depth encyclopedias organized according the scientific fields supported in HandWiki.

    Quantum Collection

    Quantum Collection
    Learn more.

    Particle Physics

    Data analysis techniques in particle physics
    Learn more.

    DataMelt book

    Online book on DataMelt software for data science
    Learn more.

    Linux Cookbook

    The Linux Cookbook: Tips and Techniques
    Learn more.

    Data science

    Course on data science with the focus on Java
    Learn more.

    Help

    This section contains the description of the HandWiki encyclopedia project.