This was a very handy service, for computer time was precious in the early ‘70.
Its users scarcely noticed, for ARPANET’s functions not only continued but steadily improved.
The use of TCP/IP standards for computer networking is now global.
No matter how thoroughly a network was armored or protected, its switches and wiring would always be vulnerable to bombs.
An attack could reduce any conceivable network to tatters.
Furthermore, they would design it to operate while in tatters. All the nodes in the network would be equal in status, each with its own authority to originate, pass and receive messages.
The messages themselves would be divided into packets.Each packet would begin at some specified source node, and end at some other specified destination node.It would wind its way through the network on an individual basis.The invention of the mailing list followed naturally.This was an ARPANET broadcasting technique in which an identical message could be sent automatically to large numbers of network subscribers.A mere twenty years had passed since the invention of the ARPANET, but few people remembered it now.