What kinds of words are usually capitalized in written English whether they come at the beginning of a sentence are not?

In written English, proper nouns such as names of people, places, organizations, and specific events are typically capitalized regardless of their position in a sentence. Additionally, titles of books, movies, and songs often capitalize major Words. The pronoun "I" is always capitalized, as well as days of the week, months, and holidays. Certain acronyms and initialisms are also capitalized.