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| | Operating system Summary |
 | | Operating systems also have to allocate I/O to processes keeping in mind the limited bandwidth of the channels used; the code used for this can be as complex as the code that is used to schedule CPU time among processes. |
 | | Operating systems are a collection of programs designed to permit a computer to manage its own operations, including peripherals (printers and modems), programs, and data. |
 | | Mainframe operating systems, such as IBM's z/OS, and embedded operating systems such as VxWorks, eCos, and Palm OS, are usually unrelated to Unix and Windows, except for Windows CE, Windows NT Embedded 4.0 and Windows XP Embedded which are descendants of Windows, and several *BSDs, and Linux distributions tailored for embedded systems. |
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