The Internet is a packet switched
network. As a matter of fact, it can
be directly traced in an unbroken
line to the very first non-trivial
packet switched network, the
ARPAnet.
The first thing to be sent over the
seminal Internet was the word
"log". It was supposed to be "login"
but the computer on the other end
died when it tried to do command
completion after receiving the letter
'g'.