If the government didn't invent the Internet, who did? Vinton Cerf developed the TCP/IP protocol, the Internet's backbone, and Tim Berners-Lee gets credit for hyperlinks. Enlarge Image Xerox PARC Xerox PARC headquarters. But full credit goes to the company where Mr. Taylor worked after leaving ARPA: Xerox. It was at the Xerox PARC labs in Silicon Valley in the 1970s that the Ethernet was developed to link different computer networks. Researchers there also developed the first personal computer (the Xerox Alto) and the graphical user interface that still drives computer usage today.