There are six basic types of home insurance.
HO-1 is bare-bones coverage that insures your house and its property against 10 or 11 named hazards. It has been discontinued in most states.
HO-2, called "broad coverage," covers additional hazards. Like HO-1, it covers the house and contents only against perils specifically named in the policy.
HO-3, called the "special" form, is the most common type of homeowners insurance. It insures your home, contents and detached structures against loss or damage from any peril except for those specifically excluded in the policy. It also covers liabilities that may arise from daily use or visitors who get injured on the property.
HO-4 is a renter’s policy that insures household contents and personal belongings against certain named perils. It might provide additional living expenses if the tenant has to move out, medical payments, and liability protection.
HO-6 is for owners of condominium units who want to insure items not covered by the association’s policy. It also covers personal property inside the unit and personal liability protection.
HO-8 is the "older home" policy. It is for owners of older homes who cannot get a policy that provides full replacement value. The HO-8 usually reimburses the owner for replacement cost less depreciation.
For a more complete description, see http://info.insure.com/home/basics.htm http://www.iii.org/individuals/homei/hbasics/arethere/.