M.D. ~ Allopathic Medicine
American Medical College Application Service (AMCAS) is the AAMC's centralized medical school application processing service. Most U.S. allopathic medical schools use AMCAS as the primary application method for their first-year entering classes.
D.O. ~ Osteopathic Medicine
American Association of Colleges of Osteopathic Medicine Application Service (AACOMAS) is the centralized online application service for the U.S. colleges of osteopathic medicine.