1. Animal
   1. Vertebrates
   2. Invertebrates
      1. Squids
      2. Octopi
2. Mineral
3. Vegetable
   1. Apples
      1. Macintosh
      2. Fuji
      3. Pink Lady (my favorite)
      4. Red Delicious
   2. Oranges
      1. Blood
      2. Valencia
      3. Persian