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An operating system is system software that manages computer hardware and software resources, and provides common services for computer programs. Learn about the main purposes, features, and classes of operating systems, such as multicomputer, distributed, embedded, real-time, and virtual machine.
Generally the operating system provides a library that sits between the operating system and normal user programs. Usually it is a C library such as Glibc or Windows API. The library handles the low-level details of passing information to the kernel and switching to supervisor mode.
Learn how operating systems manage the computer's primary memory, such as single allocation, partitioned allocation, paged memory, segmented memory, and rollout/rollin. Compare the advantages and disadvantages of each technique and see examples of systems that use them.
Early operating systems were very diverse, with each vendor or customer producing one or more operating systems specific to their particular mainframe computer. Every operating system, even from the same vendor, could have radically different models of commands, operating procedures, and such facilities as debugging aids.
Linux is a kernel first released in 1991 by Linus Torvalds, and typically packaged as a Linux distribution with system software and libraries. Linux is widely used on servers, supercomputers, embedded devices, and Android smartphones, and has the largest installed base of general-purpose operating systems.
A comprehensive table of various operating systems for different devices and platforms, with information on their creators, licenses, versions, and features. Learn about the history, nomenclature, and usage of OSs such as AIX, AmigaOS, Android, ChromeOS, and more.
Learn what a shell is in computing, how it exposes an operating system's services to a user or other programs, and how it can be command-line or graphical. Explore the history of shells from Multics to Unix to Windows, and the features and examples of different shells.
JNode (Java New Operating System Design Effort), written 99% in Java (native compiled), provides own JVM and JIT compiler. Based on GNU Classpath. [36] [37] 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 ...