The Sender and example:

The sender is an individual, group, or organization who initiates the communication. The sender's experiences, attitudes, knowledge, skill, perceptions, and culture influence the message. Example:  we think we are in a seminar speaker is a sender she or he share  all kind of helpful knowledge to develop our higher study. 

 Receiver  and example: The receiver in information theory is the receiving end of a communication channel. It receives decoded messages/information from the sender, who first encoded them. Sometimes the receiver is modeled so as to include the decoder. Example : Here in the seminar we are the receiver and we get the good information for develop our higher study.