diff --git a/sys/class.h b/sys/class.h
new file mode 100644
index 0000000..edfc389
--- /dev/null
+++ b/sys/class.h
@@ -0,0 +1,89 @@
+// MorgenGrauen MUDlib
+//
+// class.h -- Definitionen fuer Klassen von Objekten und Lebewesen.
+//            Siehe AddClass()/is_class_member() in /std/thing/description.c
+//
+// $Id: class.h 9552 2016-04-24 09:53:13Z Arathorn $
+
+#ifndef __CLASS_H__
+#define __CLASS_H__
+
+#define CLASSDB "/p/daemon/classdb"
+
+/* -------------------- Klassen fuer "Lebewesen" -------------------- */
+
+#define CL_ANIMAL "tier"
+#define CL_ARACHNID "spinne"  // und Spinnenartige
+#define CL_BIRD "vogel"
+#define CL_DARKELF "dunkelelf"
+#define CL_DEMON "daemon"
+#define CL_DRAGON "drache"
+#define CL_DWARF "zwerg"
+#define CL_ELF "elf"
+#define CL_ELEMENTAL "elementarwesen"
+#define CL_FELINE "feline"
+#define CL_FISH "fisch"
+#define CL_FROG "frosch"
+#define CL_FURIE "furie"
+#define CL_HARPY "harpyie"
+#define CL_GHOST "geist"
+#define CL_GHOUL  "ghoul"
+#define CL_GIANT "riese"
+#define CL_GNOME "gnom"
+#define CL_GOBLIN "goblin"
+#define CL_HOBBIT "hobbit"
+#define CL_HOBGOBLIN "hobgoblin"
+#define CL_HUMAN "mensch"
+#define CL_ILLUSION "illusion" // Bsp. beschworene Illusionen
+#define CL_INSECT "insekt"
+#define CL_LIVING "lebewesen"
+#define CL_MAMMAL "saeugetier"
+#define CL_MAMMAL_LAND "landsaeuger"
+#define CL_MAMMAL_WATER "wassersaeuger" // Damit man Delphinen nicht das Haar wuschelt
+#define CL_ORC "ork"
+#define CL_PLANT "pflanze"
+#define CL_REPTILE "reptil"
+#define CL_SHADOW "schattenwesen"
+#define CL_SKELETON "skelett"
+#define CL_SLIME "schleimwesen" // Fuer Einzeller und aehnliches
+#define CL_SNAKE "schlange"
+#define CL_TROLL "troll"
+#define CL_UNDEAD "untoter"
+#define CL_VAMPIRE "_cl_vampir"
+#define CL_ZOMBIE "zombie"
+#define CL_SHAPECHANGER "gestaltwandler" // Bsp. Werwoelfe etc.
+#define CL_GOLEM "golem"
+#define CL_CONSTRUCT "konstrukt"
+
+/* ------------------ Klassen nach Bewegungsmethoden ----------------- */
+
+#define CL_WALKING  "gehend"
+#define CL_CRAWLING "kriechend"
+#define CL_SWIMMING "schwimmend"
+#define CL_FLYING   "fliegend"
+
+/* -------------------- Klassen fuer Gegenstaende -------------------- */
+
+#define CL_EXPLOSIVE "sprengstoff"
+#define CL_DISEASE "krankheit"
+#define CL_CURSE "fluch"
+#define CL_INORGANIC "anorganisch"
+#define CL_POISON "gift"
+#define CL_POISONOUS "giftiges"
+#define CL_AMMUNITION "munition"
+// Es kann auch fuer Gegenstaende CL_ILLUSION verwendet werden.
+
+#define CL_ALL ({CL_ANIMAL, CL_ARACHNID, CL_BIRD, CL_DEMON, CL_DRAGON, \
+                CL_DWARF, CL_ELF, CL_ELEMENTAL, CL_FELINE, CL_FISH, CL_FROG, \
+                CL_FURIE, CL_HARPY, CL_VAMPIRE,\
+                CL_GHOST, CL_GHOUL, CL_GIANT, CL_GNOME, CL_GOBLIN, CL_HOBBIT, \
+                CL_HOBGOBLIN, CL_HUMAN, CL_INORGANIC, CL_INSECT, CL_LIVING, \
+                CL_MAMMAL, CL_MAMMAL_LAND, CL_MAMMAL_WATER, CL_ORC, CL_PLANT, \
+                CL_REPTILE, CL_SHADOW, CL_SKELETON, CL_SLIME, CL_SNAKE, \
+                CL_TROLL, CL_UNDEAD, CL_ZOMBIE, CL_SHAPECHANGER, CL_WALKING, \
+                CL_CRAWLING, CL_SWIMMING, CL_FLYING, CL_EXPLOSIVE, \
+                CL_DISEASE, CL_CURSE, CL_POISON, CL_POISONOUS, \
+                CL_AMMUNITION, CL_ILLUSION, CL_GOLEM, CL_CONSTRUCT })
+
+#endif
+