PDP-10s that still exist on the INTERNET
At one point in time the most common system on the INTERNET was the PDP-10, a 36-bit mainframe computer developed by Digital Equipment Corporation int the 1960s. As the ARPAnet grew so did the number of interconnected PDP-10s. When the ARPAnet moved towards privatization in the 1980s companies such as Systems Concepts and Cisco...