This document outlines the parts of a business letter in English. It lists 11 parts: letter head, letter date, reference, inside address, subject matter, salutation, body of letter, conclusion, signature, initial, and enclosure. It provides examples and explanations of each part, such as including the company name and address on the letter head and using "Yours Faithfully" for a first letter and "Yours Sincerely" for subsequent letters in the conclusion.