The United States Postal Service uses the abbreviation OH for the state of Ohio.
AG. American girl uses Ag as an abbreveation.
MS is the abbreviation for the state of Mississippi. Sometimes, people confuse this with Missouri, which uses the abbreviation MO, or Minnesota which is abbreviated MN.
Rhode Island.
There is not a state in the United States that uses the abbreviation of TA. TN is for the state of Tennessee and TX for Texas.
CA... California.
DC. The District of Columbia is not part of any state, and uses DC in place of a state.
Mexico
The government uses "bldg" as an abbreviation.
Rhino is the commonly uses abbreviation for Rhinoceros.
It does have a state horse, which is a mammal. North Dakota does not have the Nokota horse listed as an official state horse, but uses the terminology of Honorary Equine.
Pennsylvania