The postal abbreviation for the state of Massachusetts is MA.

Massachusetts, officially the Commonwealth of Massachusetts, is the most populous state in the New England region of the northeastern United States.

The state is named after the Massachusett tribe, which once inhabited the east side of the area, and is one of the original thirteen states. The name has been translated as “at or about the Great Hill,” “great mountain place,” or “large hill place,” among other translations.

The capital of Massachusetts is Boston, which is also the most populous city in New England. Over 80% of Massachusetts's population lives in the Greater Boston metropolitan area, a region influential upon American history, academia, and industry.

More Info: en.wikipedia.org