You usually find a collection of reference tables in the back of dictionaries, almanacs, and encyclopedias (or an index of them, if they're scattered throughout the work). As these tables appear in Wikipedia, please add them to this index.
What we have in mind is listings or tabular information for quick reference, not narrative articles.
Astronomy
Banking and Finance
Biology
Business
Computing and the Internet
Chemistry
Entertainment
Events and History
- Historical timeline of centuries, decades and years
- Historical anniversaries
- List of timelines
- Timeline of invention
- List of battles
- List of wars
- Major cases of genocide and democide
- List of terrorist groups
- List of terrorist incidents
- List of guerrilla movements
- List of guerrillas
- Extinct countries, empires, etc.
Foods and Drinks
Geography and Places
Geology
Language and Words
- List of general acronyms
- Medical acronyms
- Short words
- Language families and languages
- American and British English Differences
- Arabic alphabet
- Aramaic alphabet
- Braille
- Coptic alphabet
- Cyrillic alphabet
- Gothic alphabet
- Hebrew alphabet
- Kannada alphabet
- Korean alphabet
- Morse code
- NATO phonetic alphabet
- Phoenician alphabet
- Runic alphabet
- Shavian alphabet
- Thai alphabet
- List of isms
- List of ologies
- List of kennings
Mathematics
Medicine
People (rulers)
People (professions)
- Other Professions
People (not as rulers)
- Biographies
- Biblical figures
- List of saints
- List of bishops
- Nobel Prize winners: Physics, Chemistry, Medicine, Literature, Peace, Economics
- Famous gay lesbian or bisexual people
- Listing of noted atheists
- Listing of noted agnostics
- Listing of noted Buddhists
- Listing of noted Deists
- Listing of noted Hindus
- Recent celebrity deaths
- List of family name derivations
- List of given name derivations