<P> A subgroup of the Unix family is the Berkeley Software Distribution family, which includes FreeBSD, NetBSD, and OpenBSD . These operating systems are most commonly found on webservers, although they can also function as a personal computer OS . The Internet owes much of its existence to BSD, as many of the protocols now commonly used by computers to connect, send and receive data over a network were widely implemented and refined in BSD . The World Wide Web was also first demonstrated on a number of computers running an OS based on BSD called NeXTSTEP . </P> <P> In 1974, University of California, Berkeley installed its first Unix system . Over time, students and staff in the computer science department there began adding new programs to make things easier, such as text editors . When Berkeley received new VAX computers in 1978 with Unix installed, the school's undergraduates modified Unix even more in order to take advantage of the computer's hardware possibilities . The Defense Advanced Research Projects Agency of the US Department of Defense took interest, and decided to fund the project . Many schools, corporations, and government organizations took notice and started to use Berkeley's version of Unix instead of the official one distributed by AT&T . </P> <P> Steve Jobs, upon leaving Apple Inc. in 1985, formed NeXT Inc., a company that manufactured high - end computers running on a variation of BSD called NeXTSTEP . One of these computers was used by Tim Berners - Lee as the first webserver to create the World Wide Web . </P> <P> Developers like Keith Bostic encouraged the project to replace any non-free code that originated with Bell Labs . Once this was done, however, AT&T sued . After two years of legal disputes, the BSD project spawned a number of free derivatives, such as NetBSD and FreeBSD (both in 1993), and OpenBSD (from NetBSD in 1995). </P>

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