 is said to be
<em>bound</em> to that location.  The set of all visible
bindings<a name="%_idx_32"></a> in effect at some point in a program is
known as the <em>environment</em> in effect at that point.  The value
stored in the location to which a variable is bound is called the
variable's value.  By abuse of terminology, the variable is sometimes
said to name the value or to be bound to the value.  This is not quite
accurate, but confusion rarely results from this practice.</p>
<p>
</p>
<p>
</p>
<p>
Certai