<para>Execute a program to determine whether there
is a match; the key is true if the program returns
successfully. The device properties are made available to the
- executed program in the environment. The program's standard ouput
+ executed program in the environment. The program's standard output
is available in the <varname>RESULT</varname> key.</para>
<para>This can only be used for very short-running foreground tasks. For details,
see <varname>RUN</varname>.</para>