# cpython-withatomic / Doc / libsomeos.tex

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  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 \chapter{Optional Operating System Services} The modules described in this chapter provide interfaces to operating system features that are available on selected operating systems only. The interfaces are generally modelled after the \UNIX{} or C interfaces but they are available on some other systems as well (e.g. Windows or NT). Here's an overview: \begin{description} \item[signal] --- Set handlers for asynchronous events. \item[socket] --- Low-level networking interface. \item[select] --- Wait for I/O completion on multiple streams. \item[thread] --- Create multiple threads of control within one namespace. \end{description} 
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