The document discusses business correspondence and its various types, including business letters, memos, faxes, and emails. It describes the major parts of business letters, such as the heading, date, greeting, body, complimentary close, and signature. It also discusses letter styles, such as full-block, modified block, and indented styles. Finally, it outlines the key parts of an application letter, including the heading, date, greeting, four paragraph body emphasizing qualifications and requesting action, and closing.