Title case or headline case is a style of capitalization used for rendering the titles of published works or works of art in English. When using title case, all words are capitalized, except for minor words (typically articles, short prepositions, and some conjunctions) that are not the first or last word of the title. There are different rules for which words are major, hence capitalized. As an example, a headline might be written like this: "The Quick Brown Fox Jumps over the Lazy Dog". Rules The rules of title case are not universally standardized. The standardization is only at the level of house styles and individual style guides. Most English style guides agree that the first and last words should always be capitalized, whereas articles, short prepositions, and some conjunctions should not be. Other rules about the capitalization vary. In text processing, title case usually involves the capitalization of all words irrespective of their part of speech. This simplified variant of title case is also known as start case or initial caps. AP Stylebook According to the Associated Press Stylebook (2020 edition, 55th edition), the following rules should be applied: Capitalize the principal words. Capitalize prepositions and conjunctions of four letters or more. Lowercase the articles the, a, and an. Capitalize the first and last words (overrides the rules above). Capitalize the "to" in infinitives (e.g., I Want To Play Guitar). Chicago Manual of Style According to the Chicago Manual of Style (15th edition), the following rules should be applied: Always capitalize "major" words (nouns, pronouns, verbs, adjectives, adverbs, and some conjunctions). Lowercase the conjunctions and, but, for, or, and nor. Lowercase the articles the, a, and an. Lowercase prepositions, regardless of length, except when they are stressed, are used adverbially or adjectivally, or are used as conjunctions. Lowercase the words to and as. Lowercase the second part of Latin species names. Lowercase the second word after a hyphenated prefix (e.g., Mid-, Anti-, Super-, etc.) in compound modifiers (e.g., Mid-year, Anti-hero, etc.). Always capitalize the first and last words of titles and subtitles (overrides the rules above). Modern Language Association (MLA) Handbook According to the 9th edition of the Modern Language Association Handbook, the following title capitalization rules should be applied: Capitalize the first word of the title/heading and of any subtitle/subheading. Capitalize all major words (nouns, verbs including phrasal verbs such as "play with", adjectives, adverbs, and pronouns) in