diff --git a/extra/combinators/cleave/enhanced/enhanced.factor b/unmaintained/combinators/cleave/enhanced/enhanced.factor
similarity index 100%
rename from extra/combinators/cleave/enhanced/enhanced.factor
rename to unmaintained/combinators/cleave/enhanced/enhanced.factor
diff --git a/extra/combinators/conditional/conditional.factor b/unmaintained/combinators/conditional/conditional.factor
similarity index 100%
rename from extra/combinators/conditional/conditional.factor
rename to unmaintained/combinators/conditional/conditional.factor
diff --git a/extra/multi-method-syntax/multi-method-syntax.factor b/unmaintained/multi-method-syntax/multi-method-syntax.factor
similarity index 100%
rename from extra/multi-method-syntax/multi-method-syntax.factor
rename to unmaintained/multi-method-syntax/multi-method-syntax.factor
diff --git a/extra/math/physics/pos/pos.factor b/unmaintained/physics/pos/pos.factor
similarity index 100%
rename from extra/math/physics/pos/pos.factor
rename to unmaintained/physics/pos/pos.factor
diff --git a/extra/math/physics/vel/vel.factor b/unmaintained/physics/vel/vel.factor
similarity index 100%
rename from extra/math/physics/vel/vel.factor
rename to unmaintained/physics/vel/vel.factor