DNA (deoxyribonucleic acid) is the genomic material in cells that contains the genetic information used in the development and functioning of all known living organisms. DNA, along with RNA and proteins, is one of the three major macromolecules that are essential for life.
Further information: Osteopathic medicine in the United States. Doctor of Osteopathic Medicine (D.O.) is a professional doctoral degree for physicians and surgeons offered by medical schools in the United States. A D.O. degree graduate may become licensed as an osteopathic physician, having equivalent rights, privileges, and responsibilities as a physician who has earned the Doctor of Medicine (M.D.) degree.
In the United States, osteopathic physicians holding the D.O. degree have attained the same rights, privileges, and responsibilities as physicians with a Doctor of Medicine (M.D.) degree. Osteopathic physicians and non-physician osteopaths are so distinct that in practice they function as separate professions. As originally conceived by Andrew Still, the letters DO stood for Diplomate in Osteopathy and the title conferred by the degree was Doctor of Osteopathy.