 :short)</TT>
returns class id of a cons cell, normally 1.

<P>
There are  several functions prefixed with 'list-all-'.
These functions returns the list of a system resource or environment,
and are useful for dynamic debugging.

<P>

 <BR>
<BR> <P>

<A NAME="21887"></A>
<B>sys:gc</B> [function]

<DL COMPACT>
<DT> 
<DD> 
starts garbage collection, and returns a list of the numbers
of free words and total words allocated.
</DD>
</DL>
<BR>
<BR>

<P>

<A NAME="21897"></A>
<B>sys:*gc-hook*</B> [variable]

<DL CO