This document discusses various types of communication skills, including oral, nonverbal, and written communication. It provides tips for effective communication, such as active listening and maintaining eye contact. Barriers to communication like semantic and emotional barriers are also addressed. Different types of written communication are examined, including business correspondence, technical writing, report writing, and letters. Guidelines are provided for summarizing writing, writing business letters, technical documents, and reports. Tips are given for good communication skills and different types of letters.