1. Any interpersonal communication in which the physical gap between the participants is beyond the physiological limits of unaided human perception.
2. Asynchronous communication using portable media that are physically transported. Innis argued that the use of papyrus in Ancient Egypt made long-distance communication, and thereby empire expansion, much easier.
3. Synchronous communication between geographically separated participants, as enabled by devices such as the telegraph and telephone (both prefixed with the greek for ‘far’).
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