Ethernet, first standardized in 1983, remains the standard for local communications networks. It was developed jointly by Digital Equipment Corp., Xerox, and Intel. The first Ethernet, based on coaxial cable, supported data at 3 megabits per second. In 2017 a standard using optical fiber for 400 gigabits per second Ethernet was approved – an increase in speed by a factor over one hundred thousand in 35 years.