Dictionaries Categorized by the Dewey Decimal System

Dictionaries by the Dewey Decimal Classification

This page maps dictionary types and lexicographical projects to the ten main classes of the Dewey Decimal Classification (DDC). Each section includes an example and (where applicable) a corresponding MorDictionary page.

000 — Generalities

Reference works, encyclopedias, knowledge systems, metadata, information science.

Encyclopaedia Britannica — Traditional authoritative general encyclopedia (est. 1768).
Wikipedia — Collaborative online encyclopedia and open knowledge platform.
Stanford Encyclopedia of Philosophy — Expert-written digital reference work.
Library of Congress Classification — Major alternative library classification system.
WorldCat — Global library catalog aggregating bibliographic metadata.
Internet Archive — Digital preservation and archiving platform.
Project Gutenberg — Public domain digital text archive.
MorDictionary: 000 — Generalities

100 — Philosophy & Psychology

Dictionaries of philosophy, logic, rhetoric, psychology.

Example: Philosophical glossaries
MorDictionary: 100 — Philosophy

200 — Religion

Religious lexicons, theological dictionaries, biblical concordances.

Example: Berean Bible
MorDictionary: 200 — Religion

300 — Social Sciences

Political terminology, economics dictionaries, sociology glossaries.

Example: Legal dictionaries, political science glossaries
MorDictionary: 300 — Social Sciences

400 — Language

Linguistics, etymology, bilingual dictionaries, lexicography.

Example: Traditional language dictionaries
MorDictionary: 400 — Language

500 — Natural Sciences

Scientific terminology dictionaries.

Example: Medical dictionaries, physics glossaries
MorDictionary: 500 — Science

600 — Technology

Technical and applied science dictionaries.

Example: Engineering glossaries
MorDictionary: 600 — Technology

700 — Arts & Recreation

Art terminology, music dictionaries, film glossaries.

Example: Art historical lexicons
MorDictionary: 700 — Arts

800 — Literature

Literary terminology, genre glossaries, rhetorical devices.

Example: Poetry glossaries
MorDictionary: 800 — Literature

900 — History & Geography

Historical terminology, geographical lexicons, cultural glossaries.

Example: Historical dictionaries
MorDictionary: 900 — History