Articles in this category should be moved to subcategories when appropriate. This category may require frequent maintenance to avoid becoming too large. It should list very few, if any, article pages directly and should mainly contain subcategories.

Wikimedia Commons has media related to: Operating systems

This category and its subcategories deal with operating systems, the system software responsible for the direct control and management of hardware and basic system operations, as well as running application software such as word processing programs and Web browsers.

An article about operating systems should be categorized with all the subcategories appropriate to that article. Only when there are no appropriate subcategories should an article be categorized in the category Operating systems (see Wikipedia:Categorization and subcategories for an explanation).

Articles about operating system concepts and components can be found in Category:Operating system technology.

v • d • e Operating system General History · Timeline · List · Comparison · Usage share · Development · Advocacy Kernel Architectures General Monolithic kernel · Microkernel Subtypes Exokernel · Nanokernel · Hybrid Components Kernel space · Server Loadable kernel module · Device driver · User space · Userland Process management Process · Multiprogramming · Process control block · Interrupt · Modes: (Protected mode · Supervisor mode) · Computer multitasking · Scheduling · Context switch · Cooperative multitasking · Preemptive multitasking · CPU modes · Thread Memory management Memory protection · Segmentation · Paging · Segmentation fault · General protection fault · Bus error Examples UNIX · OpenSolaris · GNU · Linux · BSD · Windows · Mac OS X · AmigaOS 4 · BeOS · IBM OS/2 · ReactOS · MS-DOS · more… Miscellaneous concepts Boot loader · PXE · API · Virtual file system · Virtual tape library · Computer network · CLI · TUI · GUI · VUI  · HAL