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<seo title="Wiki Encyclopedia of Knowledge" metak="encyclopedia, science, technology, computers, medicine, biology, religion, philosophy, physics, astronomy, chemistry, space exploration" metad="Wiki encyclopedia of general knowledge dedicated to computing, science and technology"/> 
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[[File:Handwiki_hand.svg|60px|Encyclopedia of Knowledge]] Hand<font color='#ffb84d'>W</font>iki</div></br>
<span style="font-size:20px;font-weight:bold;">Wiki Encyclopedia of Knowledge</span>
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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 [[Special:CreateAccount | request account]] using the top-right menu. Read more [[HandWiki:About|here]]. 

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== Mathematics and Computer Science ==

Here are articles on abstract concepts related to  [[HandWiki:Computing|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. 

{{ContentGrid
|content=
{{InfoCard
|heading =  [[File:Handwiki_math.svg|45px|link=HandWiki:Math]]  [[HandWiki:Math|Mathematics]]
|content = Calculus, algebra, geometry, topology, logic, statistics and related topics<br/>
→ {{ll|HandWiki:Math| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Math Add article]] }}

{{InfoCard
|heading =  [[File:Handwiki_measurement.svg|40px|link=HandWiki:Analysis]] [[HandWiki:Analysis|Data Analysis]]
|content = Analysis techniques, data mining, algorithms and visualization <br/>
→ {{ll|HandWiki:Analysis| Learn more.}}  {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Analysis Add article]] }}

{{InfoCard
|heading =  [[File:Handwiki_computer.svg|46px|link=HandWiki:Computers]] [[HandWiki:Computers|Computer concepts]]
|content = Theory of calculations with computers, computer terms and programming languages <br/>
→ {{ll|HandWiki:Computers| Learn more.}}  {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Computers Add article]]}}

}}

== Natural and Formal Sciences ==

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

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|content=
{{InfoCard |heading =  [[File:Handwiki_astronomy.svg|46px|link=HandWiki:Astronomy]]  [[HandWiki:Astronomy|Astronomy]]
|content = Universe, celestial objects, cosmology, space science and exploration<br/>
→ {{ll|HandWiki:Astronomy| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Astronomy Add article]]  }}

{{InfoCard |heading =  [[File:Handwiki biology.svg|42px|link=HandWiki:Biology]] [[HandWiki:Biology|Biology]]
|content =  Studies of life and living organisms<br/>
→ {{ll|HandWiki:Biology| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Biology Add article]] }}

{{InfoCard |heading =  [[File:Handwiki_chemistry.svg|46px|link=HandWiki:Chemistry]] [[HandWiki:Chemistry|Chemistry]]
|content = Composition, structure and properties of matter<br/>
→ {{ll|HandWiki:Chemistry| Learn more.}} {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Chemistry Add article]]   }}

{{InfoCard |heading =  [[File:Handwiki_physics.svg|46px|link=HandWiki:Physics]] [[HandWiki:Physics|Physics]]
|content =All about physical sciences and related <br/>
→ {{ll|HandWiki:Physics| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Physics Add article]]  }}

{{InfoCard |heading =  [[File:Handwiki_earth.svg|46px|link=HandWiki:Earth]] [[HandWiki:Earth|Earth]]
|content =Sciences about the planet Earth <br/>
→ {{ll|HandWiki:Earth| Learn more.}} {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Earth Add article]] }}

{{InfoCard |heading =  [[File:Handwiki_unsolved.svg|36px|link=HandWiki:Unsolved]] [[HandWiki:Unsolved|Unsolved]]
|content = Unexplained problems and unusual observations<br/>
→ {{ll|HandWiki:Unsolved| Learn more.}} {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Unsolved Add article]]   }}

}}

== 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.

{{ContentGrid
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{{InfoCard|heading =  [[File:Handwiki_history.svg|46px|link=HandWiki:History]]  [[HandWiki:History|History]]
|content = Study of past events, chronological records and their interpretations <br/>
→ {{ll|HandWiki:History| Learn more.}} {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=History Add article]] }}

{{InfoCard |heading =  [[File:Handwiki_philosophy.svg|46px|link=HandWiki:Philosophy]] [[HandWiki:Philosophy|Philosophy]]
|content = Questions about existence, values, knowledge, reasons and mind <br/>
→ {{ll|HandWiki:Philosophy| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Philosophy Add article]]  }}

{{InfoCard |heading =  [[File: Handwiki_social.svg|46px|link=HandWiki:Social]] [[HandWiki:Social|Social]]
|content = Topics related to  social sciences and humanity <br/>
→ {{ll|HandWiki:Social| Learn more.}} {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Social Add article]] }}

{{InfoCard
|heading =  [[File:Handwiki_religion.svg|42px|link=HandWiki:Religion]] [[HandWiki:Religion|Religion]]
|content = System of beliefs and wordviews that relate humanity to spirituality <br/>
→ {{ll|HandWiki:Religion| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Religion Add article]]}}

{{InfoCard |heading =  [[File:Handwiki_medicine.svg|46px|link=HandWiki:Medicine]] [[HandWiki:Medicine|Medicine]]
|content = Different areas of medical sciences, health and related<br/>
→ {{ll|HandWiki:Medicine| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Medicine Add article]]  }}

{{InfoCard
|heading =  [[File:Handwiki_place.svg|38px|link=HandWiki:Place]] [[HandWiki:Place|Places]]
|content = Various places, particular regions and centers of population <br/>
→ {{ll|HandWiki:Place| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Place Add article]]}}

}}

== 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). 

{{ContentGrid
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{{InfoCard |heading =  [[File: Handwiki_engineering.svg|46px|link=HandWiki:Engineering]] [[HandWiki:Engineering|Engineering]]
|content = Design and manufacturing of complex devices and machines<br/>
→ {{ll|HandWiki:Engineering| Learn more.}} {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Engineering Add article]]}}

{{InfoCard
|heading =  [[File:Handwiki_software.svg|46px|link=HandWiki:Software]] [[HandWiki:Software|Software]]
|content = Computer programs and libraries organized by topics<br/>
→ {{ll|HandWiki:Software| Learn more.}}  {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Software Add article]]}}

{{InfoCard |heading =  [[File:Handwiki_finance.svg|46px|link=HandWiki:Finance]] [[HandWiki:Finance|Finance]]
|content = Finance, business, market and financial calculations <br/>
→ {{ll|HandWiki:Finance| Learn more.}} {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Finance Add article]] }}

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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. 

{{ContentGrid
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{{InfoCard
|heading =  [[File:Handwiki_organization.svg|46px|link=HandWiki:Organization]]  [[HandWiki:Organization|Organizations]]
|content = Organizations contributing to science and technology <br/>
→ {{ll|HandWiki:Organization| Learn more.}} {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Organization Add article]] }}

{{InfoCard
|heading =  [[File:Handwiki_company.svg|46px|link=HandWiki:Company]] [[HandWiki:Company|Companies]]
|content = Companies contributing to science and technologies <br/>
→ {{ll|HandWiki:Company| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Company Add article]]}}

{{InfoCard
|heading =  [[File:Handwiki_biography.svg|38px|link=HandWiki:Biography]] [[HandWiki:Biography|Biographies]]
|content = Biographies of researches in science and technology <br/>
→ {{ll|HandWiki:Biography| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Biography Add article]]}}

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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. 

{{ContentGrid
|content=
{{InfoCard
|heading =  [[File:Handwiki_book2.svg|50px|link=Book:Start]]  [[Book:Start|Books]]
|content = Online books on science, computations and technology <br/>
→ {{ll|Book:Start| Learn more.}} {{spaces|3}} [[https://handwiki.org/wiki/create/index.php?t=Book Add book]] }}

{{InfoCard
|heading =  [[File:Handwiki_monograph.svg|60px|link=Monograph:Start]] [[Monograph:Start|Monographs]]
|content = Monographs on science, computations  and technologies <br/>
→ {{ll|Monograph:Start| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Monograph Add monograph]]}}

{{InfoCard
|heading =  [[File:Handwiki_tutorial.svg|48px|link=Tutorial:Start]] [[Tutorial:Start|Tutorials]]
|content = Tutorials on science, computations and technologies <br/>
→ {{ll|Tutorial:Start| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Tutorial Add tutorial]]}}

{{InfoCard
|heading =  [[File:Handwiki_manual.svg|60px|link=Manual:Start]] [[Manual:Start|Manuals]]
|content = Manuals on science, computations and technologies <br/>
→ {{ll|Manual:Start| Learn more.}} {{spaces|3}}  [[https://handwiki.org/wiki/create/index.php?t=Manual Add manual]]}}

}}

== Topical in-depth encyclopedias ==

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

{{ContentGrid
|content=
{{InfoCard
|heading =  [[File:Handwiki_book38.png|link=Physics:PP/Start]] [[Physics:PP/Start|Particle Physics]]
|content = Data analysis techniques in particle physics <br/>
→ {{ll|Physics:PP/Start| Learn more.}} }}

{{InfoCard
|heading =  [[File:Handwiki_book38.png|link=DMelt:Start]] [[DMelt:Start | DataMelt book]]
|content = Online book on DataMelt software for data science <br/>
→ {{ll|DMelt:Start| Learn more.}} }}

{{InfoCard
|heading =  [[File:Handwiki_book38.png|link=Linux:Start]] [[Linux:Start | Linux Cookbook]]
|content = The Linux Cookbook: Tips and Techniques <br/>
→ {{ll|Linux:Start| Learn more.}} }}

{{InfoCard
|heading =  [[File:Handwiki_book38.png|link=DScience:Start]] [[DScience:Start|Data science]]
|content = Course on data science with the focus on Java <br/>
→ {{ll|DScience:Start| Learn more.}} }}

}}

== Help ==

This section contains the description of the HandWiki encyclopedia project.

* [https://handwiki.org/wiki/HandWiki:About About the HandWiki encyclopedia]
* [https://handwiki.org/wiki/HandWiki:Help Description of HandWiki formatting and editing tricks]
* [https://handwiki.org/wiki/HandWiki:Copyrights Copyright statements of HandWiki articles]


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