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OpenVMS, often referred to as just VMS, [8] is a multi-user, multiprocessing and virtual memory-based operating system.It is designed to support time-sharing, batch processing, transaction processing and workstation applications. [9]
Virtual Machine/Extended Architecture System Product (VM/XA SP) - Replaces VM/SP, VM/SP HPO and VM/XA SF; Virtual Machine/Enterprise Systems Architecture (VM/ESA), supports S/370, ESA/370 and ESA/390 (a Unix environment was available starting with [14] Version 2.) z/VM (z/Architecture version of the VM OS with 64-bit addressing).
RSX-11 is a discontinued family of multi-user real-time operating systems for PDP-11 computers created by Digital Equipment Corporation.In widespread use through the late 1970s and early 1980s, RSX-11 was influential in the development of later operating systems such as VMS and Windows NT.
Platform virtualization software, specifically emulators and hypervisors, are software packages that emulate the whole physical computer machine, often providing multiple virtual machines on one physical platform. The table below compares basic information about platform virtualization hypervisors.
The list is organized by guest operating system (the system being emulated), grouped by word length. Each section contains a list of emulators capable of emulating the specified guest, details of the range of guest systems able to be emulated, and the required host environment and licensing.
Hydra (stylized as HYDRA) is an early, discontinued, capability-based, object-oriented microkernel designed to support a wide range of possible operating systems to run on it. [1]
In 1970, while at Carnegie Mellon University (CMU), he designed the BLISS programming language and developed an optimizing compiler for it.. From 1971 to 1975, as part of CMUs C.mmp project, he worked on an operating system (OS) microkernel named Hydra which is capability-based, object-oriented, and designed to support a wide range of possible OSs to run on it.
The OS and most application software was written in the programming language BLISS-11, which required cross-compiling on a PDP-10. The OS used very little assembly language . Among the programming languages available on the system was an ALGOL 68 variant which included extensions supporting parallel computing , to make good use of the C.mmp.