This document provides information about business letters, including the different types of business letters, the major parts of a business letter, and formatting guidelines. It discusses personal-business letters that are sent from an individual to a business or organization, and business letters that are sent from one business or organization to another. The 10 major parts of a business letter are listed and described, including the letterhead, return address, dateline, letter address, salutation, body, complimentary close, signature, keyed name, and typist initials. Formatting guidelines for margins on the first page are also provided. An example letter is included to demonstrate the parts.