Anthologies edited

Analog Yearbook II (Ace 1981)
Analog anthologies in hardcover by Dial and paperback by Davis:

#1: Analog's Golden Anniversary Anthology (1980)

#2: Analog: Readers' Choice (1981)

#3: Analog's Children of the Future (1982)

#4: Analog's Lighter Side (1982)

#5: Analog: Witers' Choice (1983)

#6: War and Peace: Possible Futures from Analog (1983)

#7: Aliens from Analog (1983)

#8: Writers' Choice, Vol. II (1984)

#9: From Mind to Mind (1984)

#10: Analog's Expanding Universe (1986)

Unknown (Baen Books, 1988)
Unknown Worlds (coedited with Martin H. Greenberg; Galahad Books1989)
Analog Essays in Science (John Wiley & Sons, 1990)
Writing Science Fiction and Fantasy (coedited with Gardner Dozois, Tina Lee, Ian Randal Strock, and Sheila Williams; St. Martin's Press, 1991)
Islands in the Sky: Bold New Ideas for Colonizing Space (coedited with Robert Zubrin; John Wiley & Sons, 1996)
Roads Not Taken: Tales of Alternate History (coedited with Gardner Dozois; Del Rey, 1998)

Non-fiction books

Aliens and Alien Societies: A Writer's Guide to Creating Extraterrestrial Life-Forms (Writer's Digest Books 1996)
Which Way to the Future? (Collected Essays from Analog) (Tor 2001)
The Coming Convergence: Surprising Ways Diverse Technologies Interact to Shape Our World and Change the Future (Prometheus Books, April 2008

Articles

"Editing Your Own Stories" (SFWA Bulletin, Summer 2005)
"Treasure" (Argentus, Summer 2005)
"Mössbauer Effect Studies of Manganese-Tin Compounds" (with B. L. Robinson and S. Jha), Bull. Am. Phys. Soc., Ser. II 14, 522, 4/69
Mössbauer Effect Studies of Some Intermetallic Compounds of Tin, Ph.D.dissertation, Case Western Reserve University 1969; published by University Microfilms)
"A Realistic Literature" (Morpheus, Winter 1970)
"Detectors and Linewidths in Mössbauer Spectroscopy," Am. J. Phys. 39, No. 9, 1003, 11/72
"Constellations Seen From Other Stars" (with Louis N. Rapp), Am. J. Phys. 40, No. 11, 1703, 11/72)
"Apollo 17: The Beginning, Not the End?" (Heidelberg Alumni Magazine, Spring 1973)
"Science Fiction Courses: An Example and Some Alternatives" (Am. J. Phys. 41, No. 9, 1052, 9/73)
"Science Fiction and the Science Teacher" (Extrapolation 17, No. 2, 141, 5/76; also in Teaching Science Fiction: Education for Tomorrow, ed. Jack Williamson, Owlswick Press 1980)
"Science in Science Fiction" (in Many Futures, Many Worlds, ed. Thomas D. Clareson, Kent State Univ. Press, 1977)
"How to Move the Earth" (Analog 5/76)
"Fourier Analysis and Synthesis with a Pocket Calculator," Am. J. Phys. 45, No. 1, 79, 1/77)
"Off-Broadway Show" (Camping Journal, June/July 1981)
"Foreword" to Astounding Science Fiction, July 1939 (facsimile edition by Southern Illinois University Press, 1981)
"Where Have All the New Worlds Gone?" (Empire for the SF Writer #25, 1981)
"The Science of Science Fiction Writing" (Writer's Digest 2/83; also in 1983/84 Fiction Writer's Market; expanded and updated version in The Secrets of Writing Popular Fiction [Writer's Digest Guide, Vol. 4], 1986; also [as "Good Writing Is Not Enough"] in Writing Science Fiction and Fantasy, St. Martin's Press, 1991)
"Broccoli, Oranges, and Science Fiction" (Twilight Zone, 6/85)
"Science Fiction and the Planets" (in The New Encyclopedia of Science Fiction, ed. James Gunn, Viking Penguin, 1988)
"The Ideas That Wouldn't Die!" (Writer's Digest 3/89; reprinted in Writing Science Fiction and Fantasy, St. Martin's Press, 1991)
"The Sound of Danbury," (The News-Times, Danbury, CT, 8/7/89)
"Hypertext: A Powerful New Tool for Writers" (Writer's Digest 2/90)
"'Staging' Your Fiction" (Writer's Digest 5/90; reprinted in The Writer's Digest Handbook of Novel Writing, Spring 1992)
"A Science Fiction Writer Looks at Editors" (The Writer 7/90)
"A Science Fiction Editor Looks at Writers" (The Writer 8/90)
"Seeing Your Way to Better Stories" (in Writing Science Fiction and Fantasy, St. Martin's Press, 1991)
"Authors vs. Editors" ( in Writing Science Fiction and Fantasy, St. Martin's Press, 1991; also reprinted as Chapbook #32 in Writer's Notebook Series, Pulphouse Publishing, 1991)
"Hypertext as a Writing Tool" (SFWA Bulletin, Summer 1992)
"Introduction" to Love Songs of a Mad Scientist: The Collected Short Stories of Jerry Oltion (Hypatia Press, 1993)
"Anatomy of a Sale: 'From the Corner of the Eye' to Analog Science Fiction and Fact (in Science Fiction Writer's Marketplace and Sourcebook, Writer's Digest Books, 1994)
"Curried Goatburgers With All the Trimmings" (in Serve It Forth: Cooking with Anne McCaffrey, ed. Anne McCaffrey with John Gregory Betancourt, Warner Aspect, 1996)
"Inventing Languages for Science Fiction" (Tangent, Winter 1996)
"Silent Killers" (Writer's Digest 9/98)
"Joseph H. Delaney: An Appreciation" (Locus 6/00)