In 1980 I was working for Datapoint, a vendor with proprietary client hardware, proprietary server hardware, a proprietary LAN, and proprietary systems software. In 1983 IBM introduced the PC, and in 1985 it introduced the PC-XT with a hard disk. 3Com introduced Ethernet, and Novell created a network operating system. All of a sudden, Datapoint was on the wrong side of history in the computer business. In five short years, Datapoint went from six thousand employees to sixty.