The letter is organized to include six major sections, the first of which is called the heading. A letter heading must include the writer's street address, his city or town, the state, and the date, all keyed in the designated order. After the completion of the heading, the next section keyed is the inside address. The inside, or envelope, address is that of the party who is to receive the letter. The inside address is a required part of the business letter, although it is usually omitted from personal letters. The greeting, also known as the salutation, is the letter's next section. After the completion of the salutation, the student is ready to begin the keying of the letter's body, or message. For most letters the body will consist of three paragraphs. The first paragraph is always important because it explains the purpose of the letter, serving as an introduction. The second paragraph details the message and is truly the heart of the letter. The final paragraph of the body is supposed to bring the letter to a conclusion, hopefully ending it on a happy note. Following entry of the body the student next keys the letter's closing, followed by the keyed signature.