What are the icons on the overhead view in towns?

The icons are: 

1. Vaults or Banks are shown by metal box icons
2. Mutagenics areas are shown by a green beaker or flask icon
3. Nature areas are shown by a leaf icon
4. Armor areas are shown by a shield icon
5. Weapons areas are shown by a sword icon
6. Cooking areas are show by a fork and spoon icon
7. Science areas are shown by 2 gears icon
8. Medical areas are show by the Caduceus (serpents with wings) icon
9. Geology areas are shown by a pick axe icon
10. Ballistics areas are show by a bullet icon
11. Horse/stables are shown by a blue horseshoe icon
12. Garages are shown by a red gas can icon
13. Mail boxes are shown by an envelope icon