History of communication (35,000BC-1998AD)
There’s a neat timeline on Nathan.com tracing the development of communication through history, starting with the first paleolithic "writings" in the 36th century BC (though I suspect he may be using the word loosely, with liberal dating). The chronology is broken up by age: Nomadic, Agricultural, AD, [Scientific Revolution], Industrial, Steam, Electricity, Atomic, Data, Service, and Light Age, leaving off in 1998 with Motorola’s Iridium global sattelite system beginning operation, termed the Eleventh Information Revolution. The history can also be broken down by area of communication: Language, Mathematics, Writing/Print, Broadcasting, or Computing. Still a work in progress, but worth a gander.
The History of Communications Timeline, Nathan.com