Radiogram (message)
A radiogram is an instance of formal written message traffic routed by a network of amateur radio operators through traffic nets.
It is a plaintext message, along with relevant metadata (headers), that is placed into a traffic net by an amateur radio operator. Each radiogram is relayed, possibly through one or more other amateur radio operators, to a radio operator who volunteers to deliver the radiogram content to its destination.
Read more about Radiogram (message): Form Overview, Preamble Part, Address, Text Part