Means of communication

class of things

A general class of devices and systems for transmitting messages.

What it is a kind of

• Electrical telegraph — includes. A means of sending messages.
• Telephone — includes. A means of transmitting the voice.
• Radio — includes. A means of wireless communication.
• Internet — includes. The Internet is a means of communication.
• Optical telegraph — includes. A means of communication.

Open Evothings