Example image of eyePlorer eyePlorer map for 'Unix-like': Operating system Single UNIX Specification Unix Bell Labs Free and open source software Software license Standard Certification mark The Open Group Trademark Genericized trademark Euphemism HP-UX IBM AIX IRIX Linux MINIX Ultrix Wildcard character Xenix FreeBSD Mac OS X Solaris (operating system) Wayne R. Gray Trademark Trial and Appeal Board Kassel De facto Dennis Ritchie GNU AT&T Eric S. Raymond Berkeley Software Distribution University of California, Berkeley OS POSIX UNIX System V Ancient UNIX systems Cygwin Microsoft Windows Coherent (operating system) Idris (operating system) Proprietary software UniFLEX SunOS Tru64 UNIX GNU Project Mac OS X Leopard Mac OS X Server /dev/full /dev/hda