# AMOS

> [HTML Version](amos_asb.htm)

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**AMOS \{/switch\} <command>**

Invokes a system command from within ASB. Similar to Ashell[xs](keyword-types.htm.md). The optional _/switch_ may be /T or /S to either force tracing or silencing of all output, just as with :T and :S in command files). If omitted, the default is to display the output of commands but not the commands themselves (like :R).