PhD, ph.d. and other abbreviations
PhD degrees are new in Norway. Until a couple of years ago, each faculty used to have their own degrees: dr.art., dr.ing. etc. Now, as Norwegian universities are awarding degrees entitled philosophie doctores, I have been used to reading and writing PhD as PhD. However, I just got to know that the official Norwegian abbreviation is ph.d. with dots, no spaces and uncapitalized letters.