MD means Medical Doctor PC means Physician Certification
PC stands for personal computer
MD = Medical Doctor PC = Professional Corporation The "PC" has nothing to do with his or her education or professional accomplishments. It pertains to business, legal and tax issues only.
MD is doctor, mag is short for magazine, and the use of those abbreviations tells you the answer is an abbreviation also. The answer is JAMA (Journal of the American Medical Association).
Juris Doctor - an attorney.
The Roman numeral MD represents the number 1500
CT, DE, GA, MD, MA and NH.
There are no abbreviations in knitting which uses "mds." The questioner may have meant to say "rnds" which means "rounds."
The abbreviation "NA" does not represent any American state.
DO Doctor of Osteopathy PC Professional Corporation (that one's more like the abbreviations "corp" or "inc" -- doesn't have to do with the doctor's training).
The two most common meanings I can think of are abbreviations for Doctor of Medicine, and for Maryland. There a almost surely more uses.
These are abbreviations for the legal terms - Professional Corporation or Professional Association. A PC or PA dentist is one who has incorporated his practice for income tax purposes. These abbreviations have nothing to do with his or her ability as a dentist.
They're abbreviations to help make writing out chemical formulas easier.