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<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
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<TITLE>CLHS: Function MACHINE-INSTANCE</TITLE>
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<A NAME="machine-instance"><I>Function</I> <B>MACHINE-INSTANCE</B></A> <P>
<P><B>Syntax:</B><P>
<P>
<B>machine-instance</B> <I><I>&lt;no arguments&gt;</I></I> =&gt; <I>description</I><P>
<P>
<P><B>Arguments and Values:</B><P>
<P>
<I>description</I>---a <A REL=DEFINITION HREF="26_glo_s.htm#string"><I>string</I></A> or <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A>. <P>
<P><B>Description:</B><P>
<P>
Returns a <A REL=DEFINITION HREF="26_glo_s.htm#string"><I>string</I></A> that identifies the particular instance of the computer hardware on which Common Lisp is running, or <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A> if no such <A REL=DEFINITION HREF="26_glo_s.htm#string"><I>string</I></A> can be computed. <P>
<P><B>Examples:</B><P>
<P>
<PRE>
(machine-instance)
=&gt; &quot;ACME.COM&quot;
OR=&gt; &quot;S/N 123231&quot;
OR=&gt; &quot;18.26.0.179&quot;
OR=&gt; &quot;AA-00-04-00-A7-A4&quot;
</PRE>
</TT> <P>
<P><B>Side Effects:</B> None.
<P>
<P><B>Affected By:</B><P>
<P>
The machine instance, and the <A REL=DEFINITION HREF="26_glo_i.htm#implementation"><I>implementation</I></A>. <P>
<P><B>Exceptional Situations:</B> None.
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<P><B>See Also:</B><P>
<P>
<A REL=DEFINITION HREF="f_mach_t.htm#machine-type"><B>machine-type</B></A>, <A REL=DEFINITION HREF="f_mach_v.htm#machine-version"><B>machine-version</B></A> <P>
<P><B>Notes:</B> None.
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