T-Negative was a media science fiction fanzine by Ruth Berman of Minnesota, U.S.A.
T-Negative was one the the first fanzines devoted to Star Trek, released during the original broadcast of the television series. The title of the fanzine refers to the character Mr. Spock's bloodtype, which was T-Negative.
The first issue of T-Negative was released in June 1969. 35 issues were released during the run, which ended in March 1979 with the double issue 35/35.
In her editorial for issue 1, Ruth Berman wrote about starting her fanzine; "In November 1968 I starting watching Star Trek, mainly because Juanita Coulson had recommended it so highly in Yandro. By December, I'd gotten Eleanor Arnason hooked on it, too, and by December she made the classic remark, 'We could write that too'..." T-Negative featured fan fiction, including the first published Kraith stories, a series of interconnected Star Trek stories. These were begun by Jacqueline Lichtenberg, and first appeared in T-Negative Issue 8.
Contributors of art work included Alan Andres, Alicia Austin (Kevas and Trillium), Gail Barton (Eridani Triad), Anne Braude, Kathy Bushman, Deborah Collin, Juanita Coulson (ST-Phile), Tim Courtney, Connie Faddis (Interphase), Heather Firth, Karen Flanery, Wendy Fletcher (later known as Wendy Pini), Gary Hawfitch, C. Lee Healy, Douglas Herring, Carolyn Hillard, Mary Himmelbach, Bunny Jackson, Janice, Gregory Jein, Suzanne Kirwan, Al Kunfeld, Rae Ladore, Wendy Lindboe, Chris Loftus, David Lornazoff, Rosalind Ludwig, Barbara Marczak, Melisa Michaels, Ron Miller, Gee Moaven, Beth Moore, Anita Nordstrom, Rosalind Oberdieck, Ricky Pearson, D.C. Roberts (Impulse), Clarica Scott, Al Sirois, Gennie Summers, Anthony Tollin, Joyce Yasner (Eel-Bird Banders' Bulletin), and Bernard Zuber.
Covers were by Alan Andres, George Barr, Kathy Bushman, Mary Ann Cappa, Cory Correll, Tim Courtney, Mary Ann Emerson, Connie Faddis, Jackie Franke (Resolution), Douglas Herring, Bunny Jackson, Gregory Jein, Barbara Marczak, Gee Moaven, Rodalind Oberdieck, Ricky Pearson, Mark Schulman, Clarica Scott, Lois Spooner, Anthony Tollin and Kristina Trott.
Contributors of writing included Astrid Anderson, Barb Anderson, Cathy Anderson, Eleanor A. Arnason (All Mimsy), Ellie Back, Jennifer Bankier (Orca), Anne Braude, Judy Burns, Carmen Carter, Hal Clement, Juanita Coulson, Dean Dickensheet (Tantalus), Mary Lou Dodge, Marnie Ellington, Marica Ericson, Connie Faddis, Amy Faldowitz, Karen Fleming, Jackie Franke, Pat Gildersleeve, Jennifer Guttridge, Anna Mary Hall, Dorothy Heydt, Mary Himmelbach, Cecily Horton, Teri Howard, Dave Hulan (Pelf), Carol Pruitt Ing, Gregory Jein, Dorothy Jones, LouAnn Jones, Phyllis Ann Karr (The Literary Magazine of Fantasy and Terror), Pat Kienly, Donald Koch, Devra Langsam (Spockanalia), Jacqueline Lichtenberg, Jean Lorrah (Pandora), Shirley Meesch, Melisa Michaels, John Miesel, Sandra Miesel, Deborah Naffziger, G.L. Natho, Larry Nivens, Paula Smith (Menagerie), John Stanley, Gennie Summers, and Richard G. Van Treuren.
Letters came from G.M. Carr (Cry of the Nameless), D.C. Fontana, Alan Dean Foster, Debbie Goldstein, Shirley Malewski, Jeanne Powers, Cheryl Rice, Mandi Schultz, D.T. Steiner, Steve VanderArk, Joan Marie Verba, and Helen Young.
In the 1950s, Ruth Berman co-published All Mimsy with Eleanor Arnason and Ron Whyte. In the early 1960s, she published Dinky Bird, and then later in the decade, Despatch and Inside Star Trek, two of the few fanzines to appear during the original run of the television series, which was followed by T-Negative. In the 1970s, she also published The Star Trek Songbook. In the 1960s and 1970s, Ruth Berman was also publishing the Sherlock Holmes anthology, SH - sf Fanthology.