capitalization

For any word written in a language with whose alphabet or alphabet equivalent has two cases, such as those using the Latin, Greek, Cyrillic, or Armenian alphabet, capitalization is the writing of that word with its first letter in majuscules (uppercase) and the remaining letters in minuscules (lowercase). Such words may also be said to be in title case, since traditionally most words in titles of books, films, etc. are capitalized. In Unicode, a few letters have a title case form, where the Unicode character is different depending on whether the whole word is in uppercase or just the initial letter.

What to capitalize

Capitalization custom varies with language. The full rules of capitalization for English are complicated and have changed over time, generally to capitalize fewer terms; to the modern reader, an 18th century document seems to use initial capitals excessively. It is an important function of English style guides to describe the complete current rules.