ref: dab539cd14726de15932b0310532212f8da29bf7
dir: /sys/src/cmd/python/Doc/lib/libsomeos.tex/
\chapter{Optional Operating System Services} \label{someos} The modules described in this chapter provide interfaces to operating system features that are available on selected operating systems only. The interfaces are generally modeled 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: \localmoduletable