Stands for Berkeley Software Distribution UNIX, a version of UNIX that originated many common UNIX features such as the vi editor, C shell, and TCP/IP networking.
BSD UNIX was developed in the 1970s at the University of California at Berkeley, which licensed the UNIX operating system from AT&T and then made a number of modifications and enhancements. BSD UNIX is one of the most popular versions of UNIX in use today, the other being UNIX System V and its variants.
BSD UNIX formed the basis of the SunOS from Sun Microsystems.
Sun later combined features of both BSD and System V into their popular Solaris operating system. Another variant of BSD is the FreeBSD operating system.
In March 1978, Bill Joy, who studied at the University of California at Berkeley, released the first free version of UNIX operating system which is now known as BSD UNIX. (Berkeley Software Distribution)
After having been involved in the BSD project, Bill Joy co-founded Sun Microsystems in 1982 and led technical strategy of the company. He designed Sun's Network File System (NFS), parts of the SPARC microprocessor architecture as well as basic pipeline used in all of Sun's SPARC microprocessors.Later, he was the co-author of the specification for the Java programming language.In 1998, Bill was appointed as Chief Scientist of the company.