Graham A. Nelson (born 1968) is a Britishmathematician and poet and the creator of the Inform design system for creating interactive fiction (IF) games. He has also authored several IF games, including the acclaimed Curses (1993) and Jigsaw (1995), using the experience of writing Curses in particular to expand the range of verbs that Inform is capable of understanding. He has been described by The New York Times as "ornately literate."