* On a computer running Microsoft Windows, Mac OS X, or Unix running the X Window System, clicking the secondary mouse button ( usually the right button ) opens a context menu for the region that is under the mouse pointer.

On Unix variants the term loader is often used as a synonym for linker.

On Unix systems, the shell is still the implementation language of system startup scripts, including the program that starts the windowing system, the programs that facilitate access to the Internet, and many other essential functions.

On an Apache server, this is commonly < tt >/ home / www </ tt > ( On Unix machines, usually < tt >/ var / www </ tt >).

On Unix and Unix-like computer operating systems, a zombie process or defunct process is a process that has completed execution but still has an entry in the process table.

On the other hand, in most cases multithreading is not the only way to keep a program responsive, with non-blocking I / O and / or Unix signals being available for gaining similar results.

On Unix, Unix-like and other POSIX-compatible operating systems, popular system calls are < tt > open </ tt >, < tt > read </ tt >, < tt > write </ tt >, < tt > close </ tt >, < tt > wait </ tt >, < tt > execve </ tt >, < tt > fork </ tt >, < tt > exit </ tt >, and < tt > kill </ tt >.

On Unix, multiple directories can be specified, and < tt > mkdir </ tt > will try to create all of them.

On Unix systems, UTF-32 strings are sometimes used for storage, due to the type < tt > wchar_t </ tt > being defined as 32-bits.

On March 7, 2003, during McBride's tenure as CEO of the company, The SCO Group initiated litigation ( SCO v. IBM ) against IBM, alleging breach of contract and copyright infringement claims connected to Unix.

On August 10, 2007, the United States District Court in Utah issued a ruling that Novell had retained copyright ownership of the System V UNIX copyrights and that SCO was in breach of its covenants to provide Novell with the previously agreed royalties to the Unix technology Novell had originally sold to SCO.

On August 10, 2007, Judge Kimball, who also presides over the SCO v. Novell case, ruled that Novell, not the SCO Group, is the rightful owner of the copyrights covering the Unix operating system.

On August 24, 2009, the U. S. Court of Appeals for the Tenth Circuit reversed the portion of the August 10, 2007 district court summary judgment in SCO v. Novell, that Novell owned the copyright to Unix.

On Windows-based computers, holding while typing on the numeric keypad will create the cent sign ; on Macintosh systems, ; on Unix systems with a compose key, is a typical sequence.

On Windows and Macintosh systems, DejaVu is, however, practically unknown, whereas Bitstream Vera Sans has installation bases of 25 % and 20 % there, and 79 % on Unix, according to a survey.

On Unix / Linux computers that support multiple simultaneous X11 sessions, VNC may be set to serve a particular existing X11 session, or to start one of its own.

On POSIX platforms such as Unix, Linux and others, locale identifiers are defined similar to the BCP 47 definition of language tags, but the locale variant modifier is defined differently, and the character set is included as a part of the identifier.

On Unix systems, running the hacks from the command line will cause them to open their own non-full-screen window.

On UNIX systems and other systems which use the Common Unix Printing System, such as Mac OS X, printer drivers are typically implemented as filters.

On modern Unix ( and similar ) systems, on the other hand, they are stored in the file < tt >/ etc / shadow </ tt >, which is accessible only to programs running with enhanced privileges ( i. e., " system " privileges ).

On the other hand, BSD systems can at least claim direct ancestry to Version 7 Unix.

On a system without shadowed passwords ( typically older Unix systems dating from before 1990 or so ), the passwd file holds the following user information for each user account:

** "$ id $ salt $ hashed ", where "$ id " is the hashing algorithm used ( On GNU / Linux, "" stands for MD5, "" is Blowfish, "" is SHA-256 and "" is SHA-512, crypt ( 3 ) manpage, other Unix may have different values, like NetBSD ).

On the PC compatible platform, an entire family of operating systems was called DOS.

On March 11, 1997, id Software released WinQuake, a version of the non-OpenGL engine designed to run under Microsoft Windows ; the original Quake had been written for DOS, allowing for launch from Windows 95, but could not run under Windows NT-based operating systems because it required direct access to hardware.

On 16 October 2003 after the ruling DOS coalition was left without a parliamentary majority for the first time in almost three years, a motion for a no-confidence vote proceeding started for the parliamentary president Nataša Mićić.

On top of the File Manager API, the main DOS routines were implemented which hooked into the machine's BASIC interpreter and intercepted all disk commands.

On a " system master " disk, code is also included to relocate DOS as high in system memory as possible, up to the 48 kB limit of the Apple II's main memory ($ BFFF ).

On IBM Personal Computers and compatibles, the Basic Input Output System ( BIOS ) and DOS system calls provide a way to write text on the screen, and the ANSI. SYS driver could process standard ANSI escape sequences.

On the other hand, programs running under Windows ( both native and DOS applications ) have much less control of the display and keyboard than Linux and DOS programs can have, because of aforementioned win32 console layer.

On the other hand, DOS cannot execute these files ( except using HX DOS Extender, which supports PE files only ).

On DOS and Windows CMD, it is the " NUL " device, or simply "$ null " in PowerShell.

On the other hand, some of the DOS users switched to operating systems unsupported by QEMM, such as Windows NT series and Linux.

On Quake, he wrote the original sound engine, the DOS TCP / IP network library, and added VESA 2. 0 support.

VisiCorp's Visi On was a short-lived but influential graphical user interface-based operating environment program for IBM PC compatible personal computers running early versions of DOS.

Visi On worked on IBM PCs that used an Intel 8086 CPU and DOS operating system ; it is possible to run Visi On on DOS 6. 22, but it requires a special mouse, small partition and an XT computer.

Visi On applications were written in a subset of C VisiC, and a third-party could have ported the core software ( VisiHost, VisiMachine virtual machine, VISIONXT. EXE in IBM PC DOS version ) to Unix, but that never occurred.

On top of the microkernel, Workplace OS was to run servers ( also called operating-system personalities ) that would execute DOS, OS / 2, Microsoft Windows, OS / 400, and AIX applications.

On July 27, 1981, just prior to the August 12 PC launch, Microsoft bought the full rights to the operating system for an additional $ 50, 000, giving SCP a perpetual royalty-free license to sell DOS ( including updated versions ) with its computer hardware.

On the cover of the DOS version is a Windows logo which should probably suggest compatibility with Windows 3. 1 or Windows 95.

On the PC, the BIOS ( and thus also DOS ) traditionally maps the master 8259 interrupt requests ( IRQ0-IRQ7 ) to interrupt vector offset 8 ( INT08-INT0F ) and the slave 8259 ( in PC / AT and later ) interrupt requests ( IRQ8-IRQ15 ) to interrupt vector offset 112 ( INT70-INT77 ).