Fax Shotgun: When fax machines were state of the art, many business people would send out a ‘shotgun’ blast of info to all the contacts in their data base. They could be promoting a product or service. Since the info is generic in nature and not necessarily sent to someone that the sender has a relationship with, it can be considered a linear communication.
E-blasts: Today’s version of the Fax Shotgun is the e-blast. Technology allows for sending out large numbers of e-mail messages with the express purpose of promoting a cause. Spam laws have been developed to prevent this nuisance. The software allows you to insert a personal greeting as well as the recipient’s name. Even so, this is still linear communication.
An e-blast can serve in a positive manner if you need to send out info that a group of people require. Rather then send out individual e-mails, you can send out one message to multiple addresses.
It can likely be argued that a politician delivering a ‘state of the nation’ speech is a linear communication. Dialogue is not likely encouraged during the delivery of the content. It is a one way process that becomes two way when the pundits get a hold of it.
It can also probably be argued that this message itself is an example of a linear communication. Anybody reading this message doesn’t likely know each other.
Thanks again for your question.