Encyclopædia Britannica
Altogether, the Micropædia and Macropædia have about 40 million words and 24,000 pictures. The index has 2,350 pages, which lists all the 228,274 topics written about in the Britannica,. The Britannica uses the British spellings and not American spellings. For example, it uses colour (not color), centre (not center), and encyclopædia (not encyclopedia). However, this rule is not always followed, for example defense and not defence. The other spellings of the word is sometimes shown with a link, for example "Color: see Colour."