AhemPS or P.S. are both acceptable (see below under 'Usage'). p.s., however, is the accepted abbreviation for either particle size or pull switch, neither of which, I am sure you would agree, are particularly relevant in this instance. But I thank you all the same. GG PS: I am now wondering whether pi$$ poor grammar should be the subject of this week's rant? Dictionary DefinitionpostscriptNoun1 a note appended to a letter after the signature [syn: PS]2 textual matter that is added onto a publication; usually at the end [syn: addendum, supplement] Etymologypost- + scriptNounAn addendum to a letter, added after the author’s signature.Usage notesIn a letter, to indicate the beginning of a postscript one often uses the abbreviation PS followed by a colon.Translationsaddendum to a letterCatalan: PostdataDutch: postscriptum, nota beneFinnish: jälkikirjoitusGerman: PostskriptumSpanish: PosdataSlovene: pripisExtensive DefinitionA postscript (from post scriptum, a Latin expression meaning "after writing" and abbreviated P.S.) is a sentence, paragraph, or occasionally many paragraphs added, often hastily and incidentally, after the signature of a letter or (sometimes) the main body of an essay or book. In a book or essay, a more carefully-composed addition (e.g., for a second edition) is called an afterword. An afterword, not usually called a postscript, is written in response to critical remarks on the first edition. The word has, poetically, been used to refer to any sort of addendum to some main work, even if not attached to a main work, as in Søren Kierkegaard's book titled Concluding Unscientific Postscript.UsageThe Oxford English Dictionary lists PS both with and without full stops (PS/P.S.). A "P.S.S.", meaning a "Post-subscript", or "P.P.S.", meaning "Post-postscript" is sometimes used to allow the letter writer to add even more thoughts after the first postscript. To continue, a third postscript would be a P.P.P.S. and so on, although these additions are rarely used in practice and would probably be deemed as poor style.In popular culture"P.S. I Love You" is the title of at least three popular songs, one by Rosemary Clooney, one by The Beatles, and one by The All-American Rejects."P.S. I Love You: An Intimate Portrait of Peter Sellers" is the title of a book by Michael Sellers, the performer's son."P.S. I Love You" (2007) is a recent romance movie.Writing "P.S." was wildly popular in the 1770s and was in several of the letters Paul Revere delivered on his famous rides. Referencespostscript in Bengali: পোস্টস্ক্রিপ্টpostscript in Breton: Post-scriptumpostscript in Catalan: Postdatapostscript in Czech: Postskriptumpostscript in German: Postskriptumpostscript in Spanish: Postdata (lenguaje)postscript in French: Post-scriptumpostscript in Italian: Post scriptumpostscript in Hebrew: נ"בpostscript in Dutch: Post scriptumpostscript in Japanese: 追伸postscript in Norwegian: Postskriptumpostscript in Polish: Post scriptumpostscript in Portuguese: Post-Scriptumpostscript in Russian: Постскриптумpostscript in Simple English: Postscriptpostscript in Finnish: Jälkikirjoituspostscript in Swedish: Post scriptum