The document provides information about effective business correspondence and communication. It discusses the importance of business correspondence as a link between people and as an instrument for professional exchange of ideas. It outlines the seven C's of effective communication - clear, concise, complete, concrete, correct, coherent and courteous. The document also discusses different types of business letters and memoranda, and provides guidelines for writing effective business letters, including the required parts like the heading, inside address, salutation, body, complimentary closing and signature.