Linux is a member of the large family of Unix-like operating systems. A relative newcomer
experiencing sudden spectacular popularity starting in the late 1990s, Linux joins such wellknown
commercial Unix operating systems as System V Release 4 (SVR4), developed by
AT&T (now owned by the SCO Group); the 4.4 BSD release from the University of California
at Berkeley (4.4BSD); Digital Unix from Digital Equipment Corporation (now Hewlett-
Packard); AIX from IBM; HP-UX from Hewlett-Packard; Solaris from Sun Microsystems; and
Mac OS X from Apple Computer, Inc....