This document provides an overview of ways to contribute to Wikipedia and the Wikimedia projects. It discusses contributing by hacking on the MediaWiki software, reusing and remixing Wikipedia data through the API, translating content to other languages, designing user interfaces, administering systems infrastructure, creating mobile apps, developing bots, writing extensions, and contributing to the core codebase. The document encourages testing new features, fixing bugs, and joining the community through the provided resources on the Wikimedia site. It highlights the large scope and open nature of the Wikipedia projects.

1. How to hack on
Wikipedia

2. Wiki Media Wiki
+ 1000s

3. API
Wikipedia
in your app!
Reuse, remix &
contribute data
18M articles
15M media files
1.3T free & alive

4. Test
Hard but hearty
New features i.e.
VisualEditor
Browser test
automation
Bug Squad
4k open bugs

5. Translate
The wiki way
translatewiki.net
347 languages!
Scripts, input, RTL,
grammar...

6. Design
Start small
UX - not just art
MediaWiki first
Wikipedia last
Work with devs

7. Sysadmin
World class infra
866 wikis & more
Puppetize!
labs.wikimedia.org

8. Gadgets
Start coding here
JavaScript
Local user scripts
Share
Get promoted as
supported gadget

9. Mobile
Just anywhere
Web & native
Help us with
Android & iOS
Commons!
Bring the rest

10. Bots
Restless editors
Importing, typos
vandalism, ©...
1.657 around
Python and more

11. Extensions
Feature creation
PHP, also JS...
2.118 around
83 used by

12. Core
The wiki software
PHP
932.270 LOC
155 active
contributors
Wikipedia first

13. Join the backstage
mediawiki.org/wiki/How_to_contribute

14. Thank you!
Special Guest
MediaWiki logo .tournesols et lavande Nature morte
reworked 2 Barbara Piancastelli aux tournesols
DieBuche Vincent Van Gogh
The Noun Project
Crane Hook Hammer Translation Network Swiss Army Knife Paper Plane Robot Lego Death Star
Dmitriy John Geremy Jerry Jeff Gerlach James Fenton Mike Jon Andrew
Lagunov Caserta Good Wang Hince Trillana Forrester
commons.wikimedia.org
/wiki/File:How_to_hack_on_Wikipedia.pdf