* 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

The redesigned AIM for Mac is a full universal binary Cocoa API application that supports both Tiger and Leopard – Mac OS X 10. 4. 8 ( and above ) or Mac OS X 10. 5. 3 ( and above ).

Empirical tests with a 4. 2 GB fragmented file on a DVD media have shown that Microsoft Windows XP supports this, while Mac OS X ( as of 10. 4. 8 ) does not handle this case properly.

Unlike the IBM PC, which used 8 kB of system ROM for power-on self-test ( POST ) and basic input / output system ( BIOS ), the Mac ROM was significantly larger ( 64 kB ) and held key OS code.

OS X v10. 8 " Mountain Lion " was announced on February 16, 2012, and was released online via the App Store on July 25.

Toward the end of the PDP-8 era, operating systems such as OS / 8 and COS-310 allowed a traditional line mode editor and command-line compiler development system using languages such as PAL-III assembly language, FORTRAN, BASIC, and DIBOL.

As of OS X 10. 8, garbage collection has been deprecated in favour of automatic / manual reference counting.

Mac OS included support of TTC starting with Mac OS 8. 5.

On Mac OS X v10. 5 ( Leopard ), Apple included X. org ( X11R7. 2 codebase ) instead of XFree86 ( X11R6. 8 ).

Third-party servers under Mac OS 7, 8 and 9 included Apple's MacX and White Pine Software's eXodus.

For much of the decade, System 7, Mac OS 8, and Mac OS 9 would be in consumer Macintoshes and its clones.

* August 8 ( August 18 OS ) – Peace of Travendal concluded between the Swedish Empire, Denmark-Norway and Holstein-Gottorp in Traventhal.

Mac OS X Server 1. 0-1. 2v3 were based on Rhapsody, a hybrid of OPENSTEP from NeXT Computer and Mac OS 8. 5. 1.

By the time they finally reached Charles and the main force on October 19 ( October 8 OS ), virtually no supplies and only 6, 000 men remained, only increasing Charles ' victuals problem.

Up to Darwin 8. 0. 1, Apple released a binary installer ( as an ISO image ) after each major Mac OS X release that allowed one to install Darwin on PowerPC and Intel x86 computers as a standalone operating system.

* Public domain OS library ( MVS version 3. 8, VM / CMS release 6, DOS / VS release 34, TSS / 370 version 3 )

Carbon provides a good degree of backward compatibility for programs to run on the now-obsolete Mac OS 8 and 9, however these systems are no longer actively supported since Apple released the final OS 9 update in December 2001.

The greater processing power of most systems that run Mac OS X ( compared to systems intended to run Mac OS 8 or 9 ) helps to mitigate the performance degradation of Classic's emulation.

On 8 January 1746 ( OS ) 19 January 1746 ( NS ), the army of Bonnie Prince Charlie seized control of the town but failed to take the Castle.

Supported platforms included Windows 3. 1 / 95, OS / 2 ( 16-bit ), Linux i386, Solaris Sparc / x86, Mac OS 7. 5 – 8. 0.

Of the 32 KB RAM, 3½ KB was allocated to the OS at startup and at least 10 KB was taken up by the display buffer in contiguous display modes.

In October 2007, at the Luxemburgish Hack. lu Security Conference, Kevin Finistere and Thierry Zoller demonstrated and released a remote root shell via Bluetooth on Mac OS X v10. 3. 9 and v10. 4.

Additionally, in some kernels ( e. g. miscellaneous DOS variants ) is detected only at the time OS tries reading from a keyboard buffer and only if it's the only key sequence in the buffer, while is often translated instantly ( e. g. by INT 1Bh under DOS ).

BeOS was positioned as a multimedia platform which could be used by a substantial population of desktop users and a competitor to Mac OS and Microsoft Windows ( Linux was not relevant as a desktop OS at the time ).

It aims at supporting different computer operating systems such as Windows, classic Mac OS, and Unix-like systems, so that data may be exchanged.

In the case of Mac OS X, the driver appears not to support file fragmentation at all ( i. e. it only supports ISO 9660 Level 2 but not Level 3 ).

The original Macintosh system software was partially based on the Lisa OS, previously released by Apple for the Lisa computer in 1983 and, as part of an agreement allowing Xerox to buy shares in Apple at a favorable rate, it also used concepts from the Xerox PARC Xerox Alto, which Steve Jobs and several other Macintosh team members had previewed.

Mac OS X Lion was announced at WWDC 2011 at Moscone West.

OS / 2 designers hoped for source code conversion tools, allowing complete migration of Windows application source code to OS / 2 at some point.

The hiring of Dave Cutler, former VMS architect, in 1988 created an immediate competition with the OS / 2 team, as Cutler did not think much of the OS / 2 technology and wanted to build on his work at Digital rather than creating a " DOS plus ".

For the first time, OS / 2 was able to run more than one DOS application at a time.

Because of the limitations of the Intel 80286 processor, OS / 2 1. x could run only one DOS program at a time, and did this in a way that allowed the DOS program to have total control over the computer.

At the launch of OS / 2 Warp in 1994, Patrick Stewart was to be the Master of Ceremonies ; however Kate Mulgrew of the then-upcoming series Star Trek: Voyager was substituted at the last minute.

Microsoft made an offer in 1994 where IBM would receive the same terms as Compaq ( the number one PC manufacturer at the time ) for a license of Windows 95, if IBM ended development of OS / 2 completely.

Also, OS / 2 was used for the host PC used to control the Satellite Operations Support System equipment installed at NPR member stations from 1994 to 2007, and used to receive the network's programming via satellite.

A beta of VMWare Workstation 2. 0 released in January 2000 was the first hypervisor that could run OS / 2 at all.

One can run OS / 2 Warp 4 at Fixpack 5, but installing later Fixpacks will make the virtual machine unusable.

The difficulties in efficiently running OS / 2 have, at least once, created an opportunity for a new virtualization company.

It is unlikely that the entire OS will be open at some point in the future, because it contains third-party code, much of it from Microsoft.

* No unified object handles ( OS / 2 v2. 11 and earlier ): The availability of threads probably led system designers to overlook mechanisms which allow a single thread to wait for different types of asynchronous events at the same time, for example the keyboard and the mouse in a " console " program.