Linux Journal: Linux and Other Software ProjectsMar 10, 2000, 20:59 (1 Talkback[s])
(Other stories by Phil Hughes)
"Last week, I talked about how UNIX and Minix had influenced Linus' initial work. These operating systems set the initial direction, but they were not the only influence. Others include The GNU project of the Free Software Foundation (FSF), UNIX-like code developed at UC Berkeley, and the IEEE's POSIX standard. In addition, the availability of powerful and inexpensive computer hardware certainly helped set the direction...."
"The FSF's GNU project was started in order to make a free, UNIX-like operating system, complete with a full set of development tools and utility programs. While the operating system itself (the HURD) had never really made it, the related tools have made a significant contribution, first to the UNIX area itself and then to Linux...."
"Besides the GNU utilities, a large set of utility programs were developed at the University of California at Berkeley. Many of these utilities were initially based on UNIX code from AT&T, but the most recent release of those programs is free of the AT&T code. This made it possible to include these programs with Linux distributions as well. There are many programs, but the most obvious are the Berkeley print spooling system and the sendmail mail transfer agent."