A company communicates with customers, prospects, and the public at large through various media: advertising, telephone calls, e-mails, mass mailings, and so forth. All of these media share an important characteristic: they all carry out Communication.
Figure 14-1 shows the entity class Communication. A Communication is defined as the passing of information among two or more parties.
Figure 14-1: Communications Among Parties
Communications fall into three major categories: the first category, Personal Communication, is initiated by an individual and is directed to either one person or a relatively small number of people. ...