Contents v • Preface (Frontiers 1; Tomorrow's Alternatives) • essay by Roger Elwood 1 • Tomorrow's Alternatives? • essay by Frank Herbert 26 • Those Wonderful Years • short story by Barry N. Malzberg 35 • Univac: 2200 • short story by Clifford D. Simak 53 • Mommy Loves Ya • short fiction by David H. Charney 65 • Peritonitis • short story by Gene Wolfe 72 • Ship-Sister, Star-Sister • novelette by Robert Silverberg 104 • Harriet • short fiction by Stephen Goldin and C. F. Hensel 113 • Mutation Planet • novelette by Barrington J. Bayley 141 • Jacob's Bug • short fiction by Richard Posner 158 • Getting Around • short fiction by Barry N. Malzberg [as by K. M. O'Donnell] 165 • The Answer • short fiction by Terry Carr 169 • In Outraged Stone • short fiction by R. A. Lafferty 190 • The Morning Rush or Happy Birthday, Dear Leah • short fiction by Lee Saye