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Encyclopedia of Knowledge HandWiki

Wiki Encyclopedia of Knowledge

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. Read more here.

  • Feb 10, 2024: >1M full articles
  • Apr 30, 2023: Search in Encyclone
  • Dec 10, 2023: Migration to MW 1.38.4
  • Feb 7, 2022: Part of Encyclosphere network
  • Nov 5, 2022: Included in EncycloReader)
  • Apr 26, 2022: References can be imported from
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Featured Article
Canoo NASA Crew EV

Canoo is an American automotive startup that develops and manufactures electric vehicles such as vans for fleet, liftsyle cars, vehicle rental and ride sharing services

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Did You Know?

Arrow y.png You can publish encyclopedic articles and blogs using a decentralized publishing platform called EnHub ( The articles can also be saved and downloaded using the ZWI file format.


Arrow y.png Eclipse is an IDE used in computer programming. It contains a base workspace and an extensible plug-in system for customizing the environment for Ada, ABAP, C, C++, C#, Clojure, COBOL, D, Erlang, Fortran, Groovy, Haskell, JavaScript, Julia .. Read More

Arrow y.png 6174 is the Kaprekar's constant, but it is often called "magic number". At first glance, the number 6174 looks like any other number, but .. Read More
Featured Learning Resources

Arrow y.png Technology: What does it take to build a UFO? by the History Channel.

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

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

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Arrow y.png In 2021 DMelt project released one of the fastest search engines for data science topics with the focus on Python, Java and Groovy... Read More

Why doTERRA Essential Oils Are the Best
Since its inception in 2008, doTERRA, which means "gift of the earth" in Latin, has been providing the highest quality essential oils to people around the globe. Essential oils, or aromatic oils, have been used by many cultures for centuries as a vital part of holistic healing and well-being ... Read more

Advanced PCB Designs for Improved Fault Detection in Electrical Installations
Advanced PCB Designs for Improved Fault Detection in Electrical Installations ... Read more

Wiki of Our Sponsors

DataMelt is a free software for numeric computation, mathematics, statistics, symbolic calculations, data analysis and data visualization. The program runs on Windows/Mac OS/Linux..

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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.

Handwiki math.svg Mathematics

Calculus, algebra, geometry, topology, logic, statistics and related topics
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Handwiki measurement.svg Data Analysis

Analysis techniques, data mining, algorithms and visualization
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Handwiki computer.svg Computer concepts

Theory of calculations with computers, computer terms and programming languages
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Natural and Formal Sciences

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

Handwiki astronomy.svg Astronomy

Universe, celestial objects, cosmology, space science and exploration
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Handwiki biology.svg Biology

Studies of life and living organisms
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Handwiki chemistry.svg Chemistry

Composition, structure and properties of matter
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Handwiki physics.svg Physics

All about physical sciences and related
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Handwiki earth.svg Earth

Sciences about the planet Earth
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Handwiki unsolved.svg Unsolved

Unexplained problems and unusual observations
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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.

Handwiki history.svg History

Study of past events, chronological records and their interpretations
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Handwiki philosophy.svg Philosophy

Questions about existence, values, knowledge, reasons and mind
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Handwiki social.svg Social

Topics related to social sciences and humanity
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Handwiki religion.svg Religion

System of beliefs and wordviews that relate humanity to spirituality
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Handwiki medicine.svg Medicine

Different areas of medical sciences, health and related
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Handwiki place.svg 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).

Handwiki engineering.svg Engineering

Design and manufacturing of complex devices and machines
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Handwiki software.svg Software

Computer programs and libraries organized by topics
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Handwiki finance.svg 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.

Handwiki organization.svg Organizations

Organizations contributing to science and technology
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Handwiki company.svg Companies

Companies contributing to science and technologies
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Handwiki biography.svg Biographies

Biographies of researches in science and technology
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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.

Handwiki book2.svg Books

Online books on science, computations and technology
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Handwiki monograph.svg Monographs

Monographs on science, computations and technologies
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Handwiki tutorial.svg Tutorials

Tutorials on science, computations and technologies
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Handwiki manual.svg Manuals

Manuals on science, computations and technologies
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Topical in-depth encyclopedias

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

Handwiki book38.png Particle Physics

Data analysis techniques in particle physics
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Handwiki book38.png DataMelt book

Online book on DataMelt software for data science
Learn more.

Handwiki book38.png Linux Cookbook

The Linux Cookbook: Tips and Techniques
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Handwiki book38.png Data science

Course on data science with the focus on Java
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This section contains the description of the HandWiki encyclopedia project.

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