Wiktionary
n. (plural of postscript English)
Wikipedia
Postscripts is a quarterly British magazine of science fiction, fantasy, horror, and crime fiction, first published in June 2004. It is published by PS Publishing and the editor-in-chief is Peter Crowther.
Each issue is published in two editions: a regular newsstand-type edition and a signed, numbered, 200-copy (150 copies until issue 14) hardcover edition.
From issue 18, the magazine was transformed briefly to a quarterly anthology, before becoming biannual, producing two double-sized issues a year starting with issue 20/21.
Usage examples of "postscripts".
Clearly both postscripts, penned in deceptive scrawls, were cunning forgeries, however done o'erhead in birds’ realm.
In a few cases postscripts of an unimportant nature have been omitted without indication.