DX2843"></a>
</dt>
<dd><p>Rebuilds global unit lists automatically creating all desired metric units.
<var>x</var> is a numerical argument which is used to specify how many metric
prefixes the user wishes defined.  The arguments are as follows, with each
higher number defining all lower numbers' units:
</p>
<pre class="example">           0 - none. Only base units
           1 - kilo, centi, milli
(default)  2 - giga, mega, kilo, hecto, deka, deci, centi, milli,
               micro, nano
           3 - pet