It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama is the 30th-most extensive and the 23rd-most populous of the 50 United States.
Nosology (from Ancient Greek Î½ÏÏÎ¿Ï (nosos) , meaning disease, and - Î»Î¿Î³Î¯Î± (-logia) , meaning study of-) is a branch of medicine that deals with classification of diseases.homas Sydenham 's work in the late 17th century might also be considered a nosology. In the 19th century, Emil Kraepelin and then Jacques Bertillon developed their own nosologies. Bertillon's work, classifying causes of death, was a precursor of the modern code system, the International Classification of Diseases.
Note that NOS is an abbreviation for Not Otherwise Specified, indicating a cluster of symptoms that do not clearly fit in any single diagnostic category. NOS is often a provisional diagnosis pending additional information or testing. For an alphabetical list, see DSM-IV Codes (alphabetical) .