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<H1><A NAME="SECTION03040000000000000000">
Object Oriented Programming</A>
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The structures and behaviors of objects are described in
classes, which are defined by
<B>defclass</B> macro and <B>defmethod</B> special form.
<B>defclass</B> defines the name of the class, its super class, and
slot variable names, optionally with their types and message forwarding.
<B>defmethod</B> defines methods which will invok