# Local OS This wildcard will be substituted with the operating system of the host (the client currently executing the job). The possible return values for this wildcard include: * Linux * Mac OS X * Windows 10 * Windows 11 * Windows Server \ * *This value is dedicated to Windows Server OS hosts* * Unix {% hint style="info" %} This wildcard tells you the operating system of your host running the stream, the operating system of your client might be another - consider to have a look into this wildcard [user OS](/helmut4-releases/v4.10.1/helmut4-components/streamdesigner/wildcards/user-related-wildcards-10/user-os.md) {% endhint %} {% hint style="warning" %} Please note that Helmut4 employs case sensitivity for all types of variables. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.helmut.de/helmut4-releases/v4.10.1/helmut4-components/streamdesigner/wildcards/local-environment-related-wildcards-6/local-os.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.