* Attached Support Processor, one of the two early IBM System / 360 programs that replaces the native SPOOL facilities of OS / 360 ; the other was Houston Automatic Spooling Priority ( HASP ).

With ASP Version 3 the name was changed to Asymmetric Multiprocessor and support was added for OS / VS2 ( SVS ).

* Auxiliary Storage Pool, a group of disk drives in the IBM i ( aka OS / 400 ) operating system

Three emulators of the machine exist, ElectrEm for Windows / Linux / Mac OS X, Elkulator for Windows / DOS and the Multi-system emulator MESS.

The rise of TCP / IP during the 1990s led to a re-implementation of most of these types of support on that protocol, and AppleTalk became unsupported as of the release of Mac OS X v10. 6 in 2009.

| ATA / ATAPI-8 || ATA-8 || — || || Hybrid drive featuring non-volatile cache to speed up critical OS files || In progress

( Around 1990, OS / 2 came out with " preemptive multitasking " of DOS, an alternative to DESQview for multi-node BBS.

By 1995, many of the DOS-based BBSes had begun switching to modern multitasking operating systems, such as OS / 2, Windows 95, and Linux.

JPI first launched a MS-DOS compiler named JPI Modula-2, that later became TopSpeed Modula-2, and followed up with TopSpeed C, TopSpeed C ++ and TopSpeed Pascal compilers for both the MS-DOS and OS / 2 operating systems.

MS-DOS and Win16 subsystems ( only on i386 ) can run some applications for those platforms, and it has an OS / 2 subsystem for running CLI OS / 2 applications.

IBM contributed its Common User Access model from OS / 2's Workplace Shell.

OS / 390 or its successor, z / OS, display dates in yy. ddd format for most operations.

* On systems that support one-button mice, context menus are typically opened by pressing and holding the primary mouse button ( this works on the icons in the Dock on Mac OS X ) or by pressing a keyboard / mouse button combination ( e. g. Ctrl-mouse click in Mac OS ).

Debian GNU / Linux, which includes the GNU OS tools and Linux kernel, is a popular and influential Linux distribution.

* Open Dylan-Host of two open source, optimizing Dylan compilers targeting Unix / Linux, Mac OS X, and Microsoft Windows

EFI booting has been supported in only Microsoft Windows versions supporting GPT, the Linux kernel 2. 6. 1 and later, and Mac OS X on Intel-based Macs.

; Macintosh Common Lisp: Version 5. 2 for Apple Macintosh computers with a PowerPC processor running Mac OS X is open source.

* Installable File System ( IFS ) – a filesystem API for IBM OS / 2 and Microsoft Windows NT

Originally developed on IRIX, Freeciv has been ported to many different operating systems: it is distributed with many Linux distributions, offers installers for Microsoft Windows, and has been known to run on Mac OS X, Solaris, Ultrix, QNX, OS / 2, Cygwin, AmigaOS, RISC OS, Maemo, ZETA, SkyOS and various BSDs.

This allowed the game to be ported to different platforms such as Linux and OS / 2 ( EComStation ).

Modern Windows operating system versions are based on the newer Windows NT kernel that was originally intended for OS / 2.

Version 2. 03, and later 3. 0, faced challenges from Apple over its overlapping windows and other features Apple charged mimicked the ostensibly copyrighted " look and feel " of its operating system and " embodie and generated a copy of the Macintosh " in its OS.

OS / 2 logo

During the mid to late 1980s, Microsoft and IBM had cooperatively been developing OS / 2 as a successor to DOS.

OS / 2 would take full advantage of the aforementioned protected mode of the Intel 80286 processor and up to 16 MB of memory.

OS / 2 1. 0, released in 1987, supported swapping and multitasking and allowed running of DOS executables.

A GUI, called the Presentation Manager ( PM ), was not available with OS / 2 until version 1. 1, released in 1988.

Microsoft wanted to further develop Windows, while IBM desired for future work to be based on OS / 2.

In an attempt to resolve this tension, IBM and Microsoft agreed that IBM would develop OS / 2 2. 0, to replace OS / 2 1. 3 and Windows 3. 0, while Microsoft would develop a new operating system, OS / 2 3. 0, to later succeed OS / 2 2. 0.

On the other hand, Mac OS X has since version 10. 6 shown hard drive size using decimal prefixes ( thus matching the drive makers ' packaging ).

The DragonBall's major design win was in earlier versions of the Palm Computing platform ; however, from Palm OS 5 onwards it has been superseded by ARM-based processors from Texas Instruments and Intel.

Apple has an open-source framework for developing drivers on Mac OS X called the I / O Kit.

* Trans-Tex Software has released shareware versions for Classic Mac OS and: Trans-Tex Software

SOE has devoted one server ( Al ' Kabor ) to an OS X version of the game.

Todd Hollenshead has also expressed support for Linux: " All said, we will continue to be a leading supporter of the Linux platform because we believe it is a technically sound OS and is the OS of choice for many server ops.

Although this market segment is now much reduced, the technologies developed in this area continue to be influential on the Internet and in both Linux and Apple Mac OS X networking — and the TCP / IP protocol has now almost completely replaced IPX, AppleTalk, NBF, and other protocols used by the early PC LANs.

Links has graphics driver for X Server, Linux framebuffer, svgalib, OS / 2 PMShell and AtheOS GUI.

As of June 2012, EditShare has not released an open source version and the GNU / Linux and Mac OS platform releases have been delayed.

MINIX 3 also has support for virtual memory management, making it suitable for desktop OS use.

Dr. O ' Kane has also ported the interpreter to Mac OS X.

Apple has supported this protocol from Mac OS X 10. 4 onwards, and a Windows driver based on Apple's implementation exists for Windows XP and newer versions.

The Mac OS has been pre-installed on almost every Macintosh computer sold.

Due to its usefulness, ping has been implemented on a large number of operating systems, initially BSD Unix, but later others including Windows and Mac OS X.

Since 2005 Apple Inc .' s Mac OS X operating system has come bundled with a dictionary application and widget which credits as its source " Oxford American Dictionaries ", and contains the full text of NOAD2.