KIN OS Xbox system software Xbox (first generation) system software Xbox 360 system software Xbox One system software Xbox Series X/S system software Singularity – A research operating system written mostly in managed code (C#) Midori – A managed code operating system SONiC Azure Sphere CBL-Mariner ThreadX MITS Altair DOS – An early disk operating system for the Altair 8800 machine. MontaVista MontaVista Mobilinux Motorola VERSAdos NCR Corporation TMX – Transaction Management eXecutive IMOS – Interactive Multiprogramming Operating System (circa 1978), for the NCR Century 8200 series minicomputers VRX – Virtual Resource eXecutive NeXT NeXTSTEP Nintendo ES – a computer operating system developed originally by Nintendo and since 2008 by Esrille. It is open source and runs natively on x86 platforms. Wii system software Wii U system software Nintendo Switch system software Novell NetWare – network operating system providing high-performance network services. Has been superseded by Open Enterprise Server line, which can be based on NetWare or Linux to provide the same set of services. UnixWare Novell "SuperNOS" – a never released merge of NetWare and UnixWare Novell "Corsair" Novell "Exposé" Open Enterprise Server – the successor to NetWare Open Mobile Platform Aurora OS – the successor to Sailfish OS (not to be confused with a different Aurora OS) Quadros Systems RTXC Quadros RTOS – proprietary C-based RTOS used in embedded systems RCA Time Sharing Operating System (TSOS) – first OS supporting virtual addressing of the main storage and support for both timeshare and batch interface RoweBots DSPnano RTOS – 8/16 Bit Ultra Tiny Embedded Linux Compatible RTOS Samsung Electronics Bada Tizen is an operating system based on the Linux kernel, a project within the Linux Foundation and is governed by a Technical Steering Group (TSG) while controlled by Samsung and backed by Intel. Tizen works on a wide range of Samsung devices including smartphones, tablets, smart TVs, PCs and wearable. Orsay One UI - Android skin Scientific Data Systems (SDS) Berkeley Timesharing System for the SDS 940 SCO, SCO Group Xenix, Unix System III based distribution for the Intel 8086/8088 architecture Xenix 286, Unix System V Release 2 based distribution for the Intel 80286 architecture Xenix 386, Unix System V Release 2 based distribution for the Intel 80386 architecture SCO Unix, SCO UNIX System V/386 was the first volume commercial product licensed by AT&T to use the UNIX System trademark (1989). Derived from AT&T System V Release 3.2 with