This document provides an overview of letter writing and its various components. It discusses that letter writing is a skilled composition that reveals the writer's personality. It also differentiates between formal and informal letters. The key parts of a letter identified are the sender's address, salutation, content, and subscription. Specific examples are provided for salutations and subscriptions based on the type of letter. Common mistakes in letter writing are highlighted. The overall document serves as an introduction to learning the correct way of writing letters.