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27.1 The Operating System

The Common Lisp function software-type returns a generic name for the Operating System. The Common Lisp function software-version returns information about the version of the Operating System.

In particular software-type can be used to distinguish between systems based on Windows 95 and those based on Windows NT. software-version allows you to identify variants such as Windows Vista, Windows 7, Windows 8 and so on. See the manual pages for details.

LispWorks User Guide and Reference Manual - 13 Feb 2015