Sentence case refers to a capitalization style in which only the first letter of the sentence is capitalized. This style is commonly used in professional writing and publications. In some contexts, sentence case is also referred to as title case or headline case. Title case typically capitalizes the first letter of each word in a title, while headline case capitalizes the first letter of all words except for articles, prepositions, and conjunctions. Another term that is sometimes used as a synonym for sentence case is initial capitalization. This term refers to the practice of capitalizing only the first letter of a word or phrase.