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There are a number of Unix-like operating systems based on or descended from the Berkeley Software Distribution (BSD) series of Unix variant options. The three most notable descendants in current use are FreeBSD, OpenBSD, and NetBSD, which are all derived from 386BSD and 4.4BSD-Lite, by various routes.
A kernel is a component of a computer operating system. [1] ... FreeBSD Kernel Traditional Unix permissions, ... Windows NT FreeBSD NetBSD Solaris OSF/1 Amiga Unix
Current BSD operating system variants support many of the common IEEE, ANSI, ISO, and POSIX standards, while retaining most of the traditional BSD behavior. Like AT&T Unix, the BSD kernel is monolithic, meaning that device drivers in the kernel run in privileged mode, as part of the core of the operating system.
Unix FreeDOS: No Genode: No No No No Per-process virtual file-system layer KolibriOS: No MenuetOS: No GNU: Unix ReactOS: No L4, Fiasco, Pistachio: Plan 9: No No Unix-like, no root No snapshots, venti archival storage, per-process namespace, user-mountable file systems AROS: Syllable: Unix 64-bit, journaling, extended file attributes: Inferno ...
The article "Usage share of operating systems" provides a broader, and more general, comparison of operating systems that includes servers, mainframes and supercomputers. Because of the large number and variety of available Linux distributions , they are all grouped under a single entry; see comparison of Linux distributions for a detailed ...
This is a list of real-time operating systems (RTOSs). This is an operating system in which the time taken to process an input stimulus is less than the time lapsed until the next input stimulus of the same type.
Modular operating systems such as OS-9 and most modern monolithic-kernel operating systems such as OpenVMS, Linux, FreeBSD, NetBSD, DragonFly BSD, Solaris, and AIX can dynamically load (and unload) executable kernel modules at runtime. This modularity of the operating system is at the binary (image) level and not at the architecture level.
The PlayStation 4 operating system Zrouter: FreeBSD based firmware for embedded devices ULBSD: ULBSD is a Unix-like, desktop-oriented operating system based on FreeBSD. It aims to be easy to install and ready-to-use immediately by providing pre-installed graphical KDE5 user desktop environment. ravynOS (formerly airyxOS)