Contents (view Concise Listing)

• A Little Knowledge • [Technic History] • (1971) • novelette by Poul Anderson
• Autumntime • (1971) • short story by A. Lentini
• Foreword: Alternate Possibilities • (1972) • essay by Lester del Rey
• Good News from the Vatican • (1971) • short story by Robert Silverberg
• Hot Potato • (1971) • short story by Burt K. Filer
• I'll Be Waiting for You When the Swimming Pool Is Empty • (1971) • short story by James Tiptree, Jr.
• Occam's Scalpel • (1971) • novelette by Theodore Sturgeon
• Ornithanthropus • (1971) • short story by B. Alan Burhoe
• Rammer • [State / Leshy Circuit] • (1971) • novelette by Larry Niven
• The Human Operators • (1971) • novelette by Harlan Ellison and A. E. van Vogt
• The Man Underneath • (1971) • short story by R. A. Lafferty
• The Power of the Sentence • (1971) • short story by David M. Locke
• The Science Fiction Yearbook (1971) • (1972) • essay by Lester del Rey
• The Sliced-Crosswise Only-On-Tuesday World • [Dayworld] • (1971) • short story by Philip José Farmer
• The Wicked Flee • (1971) • short story by Harry Harrison
• To Make a New Neanderthal • (1971) • short story by W. Macfarlane [as by Wallace Macfarlane]
• When You Hear the Tone • (1971) • short story by Thomas N. Scortia