个人通信是以个人为对象的通信技术，是人类通信的最高目标。
Personal communication is a kind of communicating technology, which aims at individual person and is the highest goal of human communication.
在此请注意，大多数应用与人类通信没有任何的关系，而是关系到机器通信（MMI 或机器到机器的通信）。
Note here that the majority of the applications have nothing to do with human communication but instead with machine communication (MMI, or machine-to-machine communication).
由于人类在通信环境经历了从较早的转变，是由活字印刷的发明带来的。
Because mankind has lived through an earlier transformation in its communications environment, brought about by the invention of printing by movable type.
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