doctor - dr.
captain - cptn i believe
Capt. is the abbreviation for captain
Dr.
It's Harkness, although that is not his real name, he stole the identity of the real Captain Jack during WW1. His real identity is unknown.
M.D. (Hom.)
Ph.D.
Doctor of Philosophy
Juris Doctor is abbreviated as J.D.
A Doctor of Divinity is abbreviated D.D. or DD after your name Example: Rev. Johnson Smith, D.D.
the abbreviation is D.H.L.
Doctor of Osteopathic Medicine is abbreviated D.O.
what is a doctor captain?
Doctor is abbreviated to Dr. when used as a title in conjunction with the person's name, but not when addressing the person by title only or when using doctor merely as a noun, not a title. For example: * Dr. Smith * Dr. and Mrs. John Smith * How are you, Doctor? * Margaret is a doctor too.