Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Organized incorporated territories are those territories of the United States that are both incorporated (part of the United States proper) and organized (having an organized government authorized by an Organic Act passed by the U.S. Congress). Through most of U.S. history, regions that were admitted as U.S. states were, prior to admission, territories of this kind. Currently the only incorporated territory of the U.S. is Palmyra Atoll, which also happens to be unorganized. The District of Columbia is functionally similar to an incorporated territory, being fully a part of the United States as a non-state, but is classified separately as it was established under the unique constitutional provision for a federal capital rather than through Congressional authority over federal territory generally.