Example image of eyePlorer eyePlorer map for 'UNIX System V': Operating system Unix 1983 AT&T Computer Systems Reference implementation (computing) System V Interface Definition 1980s 1990s Berkeley Software Distribution Hewlett-Packard HP-UX IBM IBM AIX OpenSolaris Solaris (operating system) Sun Microsystems Unix wars Linux POSIX UNIX System III Curses (programming library) Inode University of California, Berkeley Vi PDP-11 VAX Inter-process communication Semaphore (programming) Shared memory Unix shell Copy-on-write Demand paging File locking Apple Inc. UX Application programming interface Library (computing) Remote File System STREAMS Transport Layer Interface Virtual file system 3B series computers 1988 1990 October 18 SunOS Unix System Laboratories Xenix Application binary interface C shell