, and <i>dup</i>;
are the <i>let</i> and label tokens.</p>

<q>Truth be told, the amount of good research into concatenative
languages is nearly non-existent. </q>

<h3>Bestiary</h3>

<table border='1' id='combinators'>
	<tr><th colspan='2'>Single Items</th></tr>
	<tr><th>drop/pop/zap</th><td>( a -- )</td></tr>
	<tr><th>nop</th><td>( a -- a )</td></tr>
	<tr><th>dup</th><td>( a -- a a )</td></tr>
	<tr><th>nip</th><td>( a b -- b )</td></tr>
	<tr><th>swap</th><td>( a b -- b a )</td></tr>
	<tr><th>over/peek</th