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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.

News

Mar 14, 2025: Pi day. Watch The Mysterious Pattern Inside the Pi (π) Constant on YouTube
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 arXiv.org.

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Featured Article

Carl Jung

Synchronicity is a concept first introduced by psychologist Carl G. Jung to describe circumstances that appear meaningfully related yet lack a causal connection. In contemporary research, synchronicity experiences refer to one's subjective experience that coincidences between events in one's mind and the outside world may be causally unrelated to each other yet have some other unknown connection...

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Recent Pages

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Did You Know?

Designed World is a YouTube channel dedicated to unexplained phenomena and unusual observations. Submit your favorite remarkable cases related to unexplained, and the channel will create a visual short story. Read more and subscribe

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

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

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

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

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

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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

Recent Blogs

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

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

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.

Mathematics

Calculus, algebra, geometry, topology, logic, statistics and related topics
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Data Analysis

Analysis techniques, data mining, algorithms and visualization
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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.

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
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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
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Social

Topics related to social sciences and humanity
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Religion

System of beliefs and wordviews that relate humanity to spirituality
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Medicine

Different areas of medical sciences, health and related
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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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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.