- Information Please Almanac
This is the online version of the Time Almanac. It is a comprehensive reference source that "allows searching along with the contents of an encyclopedia, a dictionary, an atlas, and several almanacs containing statistics, facts, and historical records."
- Guinness Worlds Records
The Guinness Worlds Records site contains "selection of records found in the Guinness World Records database."
Atlases and Maps
- Atlapedia Online
Atlapedia Online contains full color physical maps, political maps as well as key facts and statistics on countries of the world.
- Google Maps
Based on the widely-popular software Google Earth. Contains high quality pictures of some portions of the world.
- Information Please World Atlas and Map Library
It features maps and detailed profiles of all 193 countries and the 50 US States.
It is a mapping and directories site that helps people find places, get there, and find places nearby.
Dictionaries and Thesaurus
- Merriam-Webster online
Facilitates access to the print version of Merriam Webster Collegiate Dictionary Eleventh Edition. Includes thesaurus, audio pronunciations feature, real time words, word games, and other materials in the English language.
- Cambridge Dictionaries Online
Intended for non native speakers, this site provides searchable versions of Cambridge's Advanced Learner's Dictionary, Dictionary of American English, International Dictionary of Phrasal Verbs, International Dictionary of Idioms, Lerner's Dictionary, Diccionario Cambridge Klett Compact ( English-Spanish ), and Dictionnaire Cambridge Klett Compact ( English- French ).
- The Free Dictionary
Serves as "English, Medical, Legal, Financial, and Computer Dictionaries, Thesaurus, Acronyms, Idioms, Encyclopedia, a Literature Reference Library, and a Search Engine all in one".
Includes Random House Dictionary, The American Heritage® Dictionary of the English Language, Online Etymology Dictionary, Merriam-Webster's Medical Dictionary, The American Heritage® Stedman's Medical Dictionary, The American Heritage® Science Dictionary, The American Heritage® Abbreviations Dictionary and more.
- Management Dictionary
The world's biggest business dictionary of management methods, models and authors. Find 2000 business concepts, scholars and acronyms.
- Engineering Dictionary
EngNet® is a powerful Directory/Search Engine/Buyers Guide Service aimed specifically at the Engineering Industry to enable Engineers, Technicians, Tradesmen, etc. to find information and communicate effectively with suppliers in the Engineering Industry.
- Sebastian's Building/Construction Pathology Glossary
A free technical glossary for building pathology and construction technology, architecture, civil, structural, forensic, mechanical, pavement, and materials engineering, with elements of testing and quality science by A. Sebastian.
- Encyclopedia Britannica Online
An online version of the widely-used Encyclopedia Britannica. It contains more than 120,000 articles, thousands of images and videos, online dictionary and many more.
Encyclopedia.com gives free access to nearly 200,000 reference entries from sources you can cite. Plus, more than 50,000 topic summaries feature related pictures, videos, topic summaries, and newspaper and magazine articles from around the world. Encyclopedia.com also provides innovative tools that allow you to rate and sort the reference content you find to be the most useful.
Philippine Online Dictionary