This is the first time that I contact specifically information in this class, but I am familiarly with this kind of knowledge. Communication is the way that we change our personal view or news to someone else.
In the first chapter of this course, I learned the revolution of information, also the way of transfer the message.
The picture above is from Google.
Besides, signal is a way to transmitted message from sender to receiver. In our usual life, we use mobile phone to send message to our friend, we are use electrical signal for transfer message.
Message is the format for people to send message, like alphabet or sound.