Ethernet
10Base2 and 10Base5: These coaxial cables are like those used in television, but thinner.  They are also called "thinnet" or "coax". Each computer has a "T" plugged into it, and cables plug into each side of the "T". Sometimes, instead of a "T", a vampire tap is used. It supports 10MBits per second transfer speed. It was the first to be adopted, and became rare during the 21st century.