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+# Objects
+
+## Overview
+
+In Scheme, as in other Lisp dialects, "everything is an object". But
+Scheme is not "object-oriented" in the sense of classes and methods.
+
+Various Scheme implementations have bolted an object system on top of
+standard Scheme. Most of these are variants of the Common Lisp Object
+System (CLOS) which evolved from an older Lisp Machine object system
+called Flavors. The Kawa and IronScheme implementations have Java and
+C# style object systems, respectively.
+
+## Existing Scheme object systems (CLOS-like)
+
+### Meroon
+
+Queinnec93
+
+### Bigloo
+
+Included since 1.9. Mainly inspired by Meroon.
+
+* Ad-hoc polymorphism (generic functions and methods).
+* Single inheritance and mono-dispatch.
+* Introspection.
+
+### Gauche
+
+### MIT Scheme
+
+### STk and STklos
+
+## Existing Scheme object systems (other)
+
+### Kawa
+
+Java compatible
+
+### IronScheme
+
+C# compatible