9, originally from Bell Labs SONiC TurboDOS – by Software 2000, Inc. Generic, commodity, and other BLIS/COBOL A2 formerly named Active Object System (AOS), and then Bluebottle (a concurrent and active object update to the Oberon operating system) BS1000 by Siemens AG BS2000 by Siemens AG, now BS2000/OSD from Fujitsu-Siemens Computers (formerly Siemens Nixdorf Informationssysteme) BS3000 by Siemens AG (rebadging of Fujitsu's MSP operating system) Contiki for various, mostly 8-bit systems, including the Apple II series, the Atari 8-bit family, and some Commodore machines. FLEX9 (by Technical Systems Consultants (TSC) for Motorola 6809 based machines; successor to FLEX, which was for Motorola 6800 CPUs) Graphics Environment Manager (GEM) (windowing GUI for CP/M, DOS, and Atari TOS) GEOS (popular windowing GUI for PC, Commodore, Apple computers) JavaOS JNode (Java New Operating System Design Effort), written 99% in Java (native compiled), provides own JVM and JIT compiler. Based on GNU Classpath. JX Java operating system that focuses on a flexible and robust operating system architecture developed as an open source system by the University of Erlangen. KERNAL (default OS on Commodore 64) MERLIN for the Corvus Concept MorphOS (Amiga compatible) MSP by Fujitsu (successor to OS-IV), now MSP/EX, also known as Extended System Architecture (EXA), for 31-bit mode NetWare (networking OS by Novell) Oberon (operating system) (developed at ETH-Zürich by Niklaus Wirth et al.) for the Ceres and Chameleon workstation projects OSD/XC by Fujitsu-Siemens (BS2000 ported to an emulation on a Sun SPARC platform) OS-IV by Fujitsu (based on early versions of IBM's MVS) Pick (often licensed and renamed) PRIMOS by Prime Computer (sometimes spelled PR1MOS and PR1ME) Sinclair QDOS (multitasking for the Sinclair QL computer) SSB-DOS (by Technical Systems Consultants (TSC) for Smoke Signal Broadcasting; a variant of FLEX in most respects) SymbOS (GUI based multitasking operating system for Z80 computers) Symobi (GUI based modern micro-kernel OS for x86, ARM and PowerPC processors, developed by Miray Software; used and developed further at Technical University of Munich) TripOS, 1978 TurboDOS (Software 2000, Inc.) UCSD p-System (portable complete programming environment/operating system/virtual machine developed by a long running student project at UCSD; directed by Prof Kenneth Bowles; written in Pascal) VOS by Stratus Technologies with strong influence from Multics VOS3 by Hitachi for its IBM-compatible mainframes, based on IBM's MVS VM2000 by Siemens AG Visi On (first GUI for early PC machines; not commercially successful) VPS/VM (IBM based, main operating system at Boston University