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==Explore Wikipedia's Contents==

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Below are content navigation systems to help you browse the encyclopedia. They serve as an alternative to the search box, and are especially useful when you don't know exactly what you are looking for, or for when you want to see ''everything'' on a particular subject.

== Topic lists ==

Presenting article links, list articles provide the function of tables of contents.

=== Overviews ===

* [[Portal:Contents/Overviews|Overview]]—main articles of various topics

* [[Portal:Contents/Outlines|Outlines]]—subject summaries, as follows:

*# Ease of discovery—outlines show which topics belong to a subject and why

*# Subject structure—outlines show topic relationships (what belongs to what)

* [[List of academic disciplines and sub-disciplines]]—subjects studied in college or university

* Classification systems providing an outline or overview of knowledge:

** [[List of Dewey Decimal classes]]—top two levels of this library classification system, linked to Wikipedia articles

** [[Library of Congress Classification]]—LCC subjects linked to Wikipedia articles

** [[Wikipedia:Outline of Roget's Thesaurus|Outline of Roget's Thesaurus]]—articles organised into a system based on six classes, with thousands of branches, following Roget's system

=== Item lists ===

* [[Portal:Contents/Lists|Lists]]—List of lists of related items (things)

* Two of the broadest item list collections are:

** [[Lists of countries and territories]] and many [[lists by country]]

** [[Lists of people]] including [[Lists of people by nationality|by nationality]] and [[Lists of people by occupation|by occupation]]

=== Timelines ===

* [[List of timelines|Timelines]]—list articles chronologically.

** [[List of centuries]]

** [[List of decades]]

** [[List of historical anniversaries]]—e.g. events on January 1 of any year

** [[{{CURRENTYEAR}}]]—major events this year

** [[Portal:Current events]]—featured current events and related project activities

** [[Deaths in {{CURRENTYEAR}}]]—lists notable people who died this year

** [[:Category:Graphical timelines]]—graphical timelines in the category and subcategories, arranged alphabetically

=== Lists of articles by quality or popularity ===

==== <small>Featured content</small> ====

[[Portal:Featured content|Featured content]] is the best Wikipedia has to offer, via vigorous [[Wikipedia:Peer review|peer review]]. Presented by type:

* [[Wikipedia:Featured articles|Featured articles]]{{·}}[[Wikipedia:Featured lists|Featured lists]]{{·}} [[Wikipedia:Featured pictures|Featured pictures]]{{·}} [[Portal:Featured portals|Featured portals]]{{·}} [[Portal:Featured sounds|Featured sounds]]{{·}} [[Wikipedia:Featured topics|Featured topics]]

====<small>Most popular articles</small>====

* [[Wikipedia:Top 5000 pages]] (of the last week)

* [http://wikitop.alwaysdata.net Wikitop]—Top 30 most popular articles by categories, with user comments on traffic jumps

=== <small>Vital articles</small>===

Topics considered most essential, from 10 articles in Level 1 to approaching 10,000 in Level 4.

{{Wikipedia:Vital articles/Level/Nav bar}}

==Alternate formats==

=== Portals ===

A portal introduces the reader to a subject by presenting images, categories and excerpts of key articles. Portals also guide editing by providing to-do lists.

* [[Portal:Contents/Portals|Portals]]{{·}}[[:Category:Portals]]

=== Wikipedia books ===

[[Wikipedia:Books|Wikipedia books]] are collections of Wikipedia articles that can be viewed, downloaded, or printed into a book. They provide a roadmap for a course of study in a particular subject.

* [[:Category:Wikipedia books (community books)]]—an alphabetical list of the books

* [[:Category:Wikipedia books]]—a list of the books, categorized by topic

=== Spoken articles ===

Growing collections of Wikipedia articles are starting to become available as spoken word recordings as well.

* [[:Category:Spoken articles]]—an organized list of all spoken articles

* [[Wikipedia:Spoken articles]]—some general information about the spoken article technology

== Glossaries ==

Glossaries are lists of terms with definitions. Wikipedia includes hundreds of alphabetical glossaries.

* [[Portal:Contents/Glossaries|Glossaries]]{{·}} [[:Category:Glossaries]]

== Wikipedia's index systems ==

=== Category system ===

Wikipedia's [[Wikipedia:Categorization|collection of category pages]] is a classified index system. It is automatically generated from category tags at the bottoms of articles and most other pages. Nearly all of the articles available so far on the website can be found through these subject indexes.

If you are simply looking to browse articles by topic, there are three top-level pages to choose from:

* [[:Category:Main topic classifications]]—probably what you are looking for: Arts, History, Technology, etc.

* [[:Category:Fundamental categories]]—organizes articles into 'abstract' [[ontology|ontological]] categories in a way that every article can reasonably be expected to be classified within it; and

* [[Portal:Contents/Categories]]—a hand-crafted list of first- and second-level topic categories.

For biographies, see [[:Category:People categories by parameter]].

[[:Category:Contents]] is technically at the top of the category hierarchy, but contains many categories useful to editors but not readers. [[Special:Categories]] lists every category alphabetically.

===Alphabetical lists of articles===

Wikipedia's alphabetical article indexes

* [[Special:Allpages]] lists all of the current pages in Wikipedia.

* [[Portal:Contents/A–Z index]] provides an easy way to skip to a particular part of the alphabet in the list of all articles.

* Lists of alphabetical indexes

** [[:Category:Indexes of topics]]—alphabetical list of topic indexes

** [[Portal:Contents/Indexes]]—indexes sorted by topic area

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