- postscript, PS - a note appended to a letter after the signature
--1 is a kind of note, annotation, notation
--1 is a part of letter, missive - addendum, supplement, postscript - textual matter that is added onto a publication; usually at the end
--2 is a kind of matter
--2 is a part of back matter, end matter
--2 has particulars: appendix; sequel, continuation