The AMS is a state of the art detector for extraterrestrial study of
antimatter, matter and missing matter. After a precursor flight on STS91 in May
1998, AMS will be installed on the International Space Station where it will
operate for three years. In this paper the AMS experiment is described and is
physics potential reviewed.Comment: Invited talk to S. Miniato 1997, to be published on N.I.M., 8 pages 7
figures, LATEX, espcvc2.sty include
