<P> A postscript may be a sentence , a 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 . The word `` postscript '' has , poetically , been used to refer to any sort of addendum to some main work , even if it is not attached to a main work , as in Søren Kierkegaard 's book titled Concluding Unscientific Postscript . </P>
<P> A postscript may be a sentence , a 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 . The word `` postscript '' has , poetically , been used to refer to any sort of addendum to some main work , even if it is not attached to a main work , as in Søren Kierkegaard 's book titled Concluding Unscientific Postscript . </P>
where is p.s . written in a letter
where is p.s . written in a letter
after the signature
after the signature