diff --git a/common/GNUfiles.mk b/common/GNUfiles.mk
index e7fb9522..b1cc1170 100644
--- a/common/GNUfiles.mk
+++ b/common/GNUfiles.mk
@@ -4,10 +4,8 @@ CFILES += \
 	common/areaevents.c \
 	common/control.c \
 	common/matrix.c \
-	common/menu.c \
 	common/ptrarray.c \
-	common/shouldquit.c \
-	common/types.c
+	common/shouldquit.c
 
 HFILES += \
 	common/uipriv.h
diff --git a/common/menu.c b/common/menu.c
deleted file mode 100644
index b9ccfedb..00000000
--- a/common/menu.c
+++ /dev/null
@@ -1,19 +0,0 @@
-// 29 may 2015
-#include "../ui.h"
-
-static uintmax_t type_uiMenu = 0;
-static uintmax_t type_uiMenuItem = 0;
-
-uintmax_t uiMenuType(void)
-{
-	if (type_uiMenu == 0)
-		type_uiMenu = uiRegisterType("uiMenu", 0, 0);
-	return type_uiMenu;
-}
-
-uintmax_t uiMenuItemType(void)
-{
-	if (type_uiMenuItem == 0)
-		type_uiMenuItem = uiRegisterType("uiMenuItem", 0, 0);
-	return type_uiMenuItem;
-}
diff --git a/common/types.c b/common/types.c
deleted file mode 100644
index d99b50d3..00000000
--- a/common/types.c
+++ /dev/null
@@ -1,88 +0,0 @@
-// 17 may 2015
-#include "../ui.h"
-#include "uipriv.h"
-
-struct typeinfo {
-	const char *name;
-	uintmax_t parent;
-	size_t size;
-};
-
-static struct ptrArray *types = NULL;
-
-uintmax_t uiRegisterType(const char *name, uintmax_t parent, size_t size)
-{
-	struct typeinfo *ti;
-
-	if (types == NULL) {
-		types = newPtrArray();
-		// reserve ID 0
-		ptrArrayAppend(types, NULL);
-	}
-	// TODO prevent our size from being smaller than our parent's
-	ti = uiNew(struct typeinfo);
-	ti->name = name;
-	ti->parent = parent;
-	ti->size = size;
-	ptrArrayAppend(types, ti);
-	return types->len - 1;
-}
-
-void *uiIsA(void *p, uintmax_t id, int fail)
-{
-	uiTyped *t;
-	struct typeinfo *ti, *ti2;
-	uintmax_t compareTo;
-
-	if (id == 0 || id >= types->len)
-		complain("invalid type ID given to uiIsA()");
-	t = (uiTyped *) p;
-	compareTo = t->Type;
-	if (compareTo == 0)
-		complain("object %p has no type in uiIsA()", t);
-	for (;;) {
-		if (compareTo >= types->len)
-			complain("invalid type ID in uiIsA()", t);
-		if (compareTo == id)
-			return t;
-		ti = ptrArrayIndex(types, struct typeinfo *, compareTo);
-		if (ti->parent == 0)
-			break;
-		compareTo = ti->parent;
-	}
-	if (fail) {
-		ti = ptrArrayIndex(types, struct typeinfo *, id);
-		ti2 = ptrArrayIndex(types, struct typeinfo *, t->Type);
-		complain("object %p not a %s in uiIsA() (is a %s)", t, ti->name, ti2->name);
-	}
-	return NULL;
-}
-
-void uninitTypes(void)
-{
-	struct typeinfo *ti;
-
-	if (types == NULL)		// never initialized; do nothing
-		return;
-	// the first entry is NULL; get rid of it directly
-	ptrArrayDelete(types, 0);
-	while (types->len != 0) {
-		ti = ptrArrayIndex(types, struct typeinfo *, 0);
-		ptrArrayDelete(types, 0);
-		uiFree(ti);
-	}
-	ptrArrayDestroy(types);
-}
-
-uiTyped *newTyped(uintmax_t type)
-{
-	struct typeinfo *ti;
-	uiTyped *instance;
-
-	if (type == 0 || type >= types->len)
-		complain("invalid type ID given to newTyped()");
-	ti = ptrArrayIndex(types, struct typeinfo *, type);
-	instance = (uiTyped *) uiAlloc(ti->size, ti->name);
-	instance->Type = type;
-	return instance;
-}
diff --git a/common/uipriv.h b/common/uipriv.h
index 6fec344c..2fd9146b 100644
--- a/common/uipriv.h
+++ b/common/uipriv.h
@@ -38,10 +38,6 @@ void ptrArrayDelete(struct ptrArray *, uintmax_t);
 // shouldquit.c
 extern int shouldQuit(void);
 
-// types.c
-extern void uninitTypes(void);
-extern uiTyped *newTyped(uintmax_t type);
-
 // areaevents.c
 typedef struct clickCounter clickCounter;
 // you should call Reset() to zero-initialize a new instance
diff --git a/darwin/main.m b/darwin/main.m
index 08f33ab9..07db4459 100644
--- a/darwin/main.m
+++ b/darwin/main.m
@@ -119,7 +119,6 @@ void uiUninit(void)
 	[realNSApp() setDelegate:nil];
 	[appDelegate() release];
 	[realNSApp() release];
-	uninitTypes();
 	uninitAlloc();
 }
 
diff --git a/unix/main.c b/unix/main.c
index 673677f2..07010cd5 100644
--- a/unix/main.c
+++ b/unix/main.c
@@ -21,7 +21,6 @@ const char *uiInit(uiInitOptions *o)
 void uiUninit(void)
 {
 	uninitMenus();
-	uninitTypes();
 	uninitAlloc();
 }
 
diff --git a/windows/init.cpp b/windows/init.cpp
index bb0b6794..15dd4edd 100644
--- a/windows/init.cpp
+++ b/windows/init.cpp
@@ -151,7 +151,6 @@ void uiUninit(void)
 	unregisterWindowClass();
 	// no need to delete the default icon or cursor; see http://stackoverflow.com/questions/30603077/
 	uninitUtilWindow();
-	uninitTypes();
 	uninitAlloc();
 }