abbreviations - English Language Usage Stack Exchange Possible Duplicate: Should I write “PhD” or “Ph D ”? I see that PhD is written PhD while the undergraduate degree is written B Sc What's the reason for this? Should I write the Master of Sci
Which was the first doctor, M. D. or Ph. D. ? For which title was the term "doctor" first given? Was it originally meant for the medical doctor, or for just anyone holding a doctoral degree? Also: When did the later usage become common, and