The document outlines the standard elements of a business letter structure, including: 1) Heading, 2) Date, 3) Inside Address, 4) Salutation, 5) Message, 6) Complimentary Close, and 7) Signature Block. It describes the purpose and formatting of each element. Additionally, it discusses some optional elements that can be included like an Attention Line, Subject Line, Enclosures Notation, and Postscript. The document provides examples and guidelines for writing formal business letters.