Wikipedia

Wikipedia is definitely the best free online encyclopedia, and possibly the best for any price. Search it using Wikipedia’s search box below.

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Britannica

Britannica.com is the oldest and largest general reference in the English language. The free version is very lightweight, with banner and pop-up ads.

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More Resources

• Probert Encyclopaedia – an independent reference encyclopaedia, consisting of over 235,000 concise & fully interlinked articles.
• InfoPlease – uses Columbia Encyclopedia & other reference resources.