This document provides information about business letters and application letters. It defines a business letter as a formal letter used for communication between businesses or organizations. The document then lists the typical parts of a business letter: date, address, salutation, introduction, body, closing, and signature. It also lists some common types of business letters. The document focuses on application letters, defining them as letters used to apply for jobs. It provides an example structure for an application letter, including a heading, salutation, three paragraph body discussing why the applicant is applying and their qualifications, and a signature.