This document discusses several models of communication: 1. The Models-R model views communication as a simple "stimulus-response" process. 2. Lasswell's model sees communication as the process of transmitting messages through a medium to an audience with the goal of creating some effect. 3. Shannon and Weaver's model focuses on how messages are transmitted and received, taking into account noise interference. 4. Wilbur Schramm's model presents an abstract representation of a phenomenon by highlighting key elements, in order to better understand communication concepts.