The document discusses various communication media and barriers to effective communication. It describes verbal communication as either oral (spoken) or written. Oral communication includes conversations and presentations while written includes emails and reports. Non-verbal communication encompasses body language, gestures, facial expressions, eye contact, posture, touching, dress and paralanguage. Some key differences between oral and written communication are discussed. Barriers to clear communication mentioned include physical, semantic and psychological factors like noise, language, perceptions and listening habits.