World Wide Web
It all begun with a "Face to Face" communication within earshot a long time ago. The cornerstone was set when the seeding of modern service-culture was set out. The message was then delivered through a serivce. Face to carrier to Face communication was the opening in a new age. A carrier is a person on horse, a book, a raido system, a telephone system or the internet in nower days.Today, there is a uni-cast communication (telephone,{e}mail,etc.),
a multi-cast communication (newspaper,social networking,etc.) and
a broad-cast communication (raidio, blogging, webpages,etc.) available.
If you like, you can talk to everyone on earth and beyond our planet - hoping someone is listening!