On March 9, 1977, Bill Joy compiled the first version of Berkeley Systems Distribution Unix, known as 1BSD. This version was just an add-on to an existing Unix, however. Two years later, he released 2BSD, which added two new programs from his repertoire: vi and the C Shell.
In the 1980s, BSD was just another leg of the Unix table. DEC used it as the basis for Ultrix, and Sun Microsystems based its SunOS on it. But BSD today is more about open-source development than it was in the 1980s. When Unix System V version 4 shipped in the early 1980s, the BSD community began to focus more on the desktop than on the server, and the many varieties of BSD were born.
