This document discusses key concepts in business communication. It defines business communication as evoking shared meaning between people. Interpersonal communication refers to communication between two or more people in an organization. Effective communication requires understanding perceptual screens, messages, feedback loops, and language. New communication technologies impact behavior by providing immediate access to information and people but can also make communication more impersonal. The document emphasizes the importance of reflective listening, nondefensive communication, understanding nonverbal cues, and using new technologies effectively.