Seeing Michael's post on Epithetology caused me to think about degree abbreviations. Is it considered kosher to abbreviate degrees the way you prefer or should/must you stick to the school's abbreviation. For instance, Oxford Graduate School (now Omega Graduate School) used to offer the Doctor of Philosophy (DPhil) in keeping with their homage to Oxford. I believe now as Omega it is a PhD. Would it be appropriate for an Oxford Grad School alumnus to abbreviate their degree as PhD (normative for the US)?