Schubert is a Maple package for intersection theory and enumerative geometry. It was developed by Sheldon Katz and Stein Arild Strømme, starting in 1992. Currently (2001), Jan-Magnus Økland is working with Schubert, developing and porting to recent versions of Maple.
The first version was for MapleV Release 2, later upgraded to Release 3.
Note that Maple8 is backwards source compatible with Maple7 and Maple6, so there's one source and three binary distributions.