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what are the type on audio communication
Many many
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Communicative functions are the purpose of communication. The functions define what you hope to accomplish through communication, and the varying types of communication used to accomplish that.
what types of communitcations were used in the 1600's
Bgp(border gateway protocol)
The motor used in a table fan is usually a shaded pole motor.
A purchase order may be is used to support a hazardous material request and reviewed by the hazmat function for approval.
Foot, horse, pigeon, and the telegraph. There was also various on-field communication such as flags (semafore?), drums, and horns.
By Business Communication's point of view:- There are basically two types of reports 1. letter 2. Memorandum or Memo Letter is used for inner communication i.e. with in same organization. Memo is used for inter communication outside the organization.
D. pillow block
Most languages were spoken but some used sign language, too.