The 24th World Science Fiction Convention, also known as Tricon, was held 1–5 September 1966 at the Sheraton-Cleveland in Cleveland, Ohio, United States. Officially, the convention was hosted by three cities in the region: Cincinnati, Cleveland, and Detroit, — hence the name "Tricon".
The three co-chairmen of that Worldcon each represented their city's fandom; they were Ben Jason of Cleveland, Howard DeVore of Detroit, and Lou Tabakow of Cincinnati. The guest of honor was L. Sprague de Camp and the toastmaster was Isaac Asimov. Total attendance at Tricon was approximately 850. Of special note: At Tricon, Gene Roddenberry premiered both pilot episodes, "The Cage" and "Where No Man Has Gone Before", for his upcoming NBC TV series Star Trek.
|Tricon, the 24th World Science Fiction Convention|
|Inaugurated||September 1–5, 1966|
The Hugo Awards, named after Hugo Gernsback, are presented every year for the best science fiction or fantasy works and achievements of the previous year. The results are based on the ballots submitted by members of the World Science Fiction Society. Other awards, including the John W. Campbell Award for Best New Writer (since 1973), are also presented at each year's Worldcon. 
23rd World Science Fiction Convention
Loncon II in London, UK (1965)
| List of Worldcons
24th World Science Fiction Convention
Tricon in Cleveland, United States (1966)
25th World Science Fiction Convention
Nycon 3 in New York, United States (1967)
The 23rd World Science Fiction Convention, also known as Loncon II, was held 27–30 August 1965 at the Mount Royal Hotel in London, United Kingdom. It was the second Worldcon to be held in London, following the original Loncon in 1957.The chairman was Ella Parker. The guest of honour was Brian W. Aldiss. The toastmaster was Tom Boardman. Total attendance was approximately 350.25th World Science Fiction Convention
The 25th World Science Fiction Convention, also known as NyCon 3 or Nycon 3, was held August 31-September 4, 1967, at the Statler Hilton Hotel in New York, New York, United States.
The chairmen were Ted White and Dave Van Arnam. The guests of honor were Lester del Rey (pro) and Bob Tucker (fan). The toastmaster was Harlan Ellison. Total attendance was approximately 1,500.ConCoction (convention)
ConCoction is a full-spectrum multi-genre fantasy and science fiction convention based in Cleveland, Ohio, and is annually in March. It is a not-for-profit endeavor run by the local and regional community of fans to promote Community Service, Education, and the Arts in Northeastern, Ohio.
ConCoction as a convention offers several tracks of programming in the arts, costuming, music/filk, literary, media, and the sciences. The convention also includes such events as an art show, a masquerade, an exhibit hall, a gaming hall, and at least one dance. ConCoction also has a children's track of programming that has included open gaming, make and take crafts and the attack of Godzilla as well as costuming, and science programs.
In 2016 this group will be celebrating the theme of "Space", where they will be commemorating the 50th anniversary of TriCon, the 24th World Science Fiction Convention held in Cleveland, Ohio on 1–5 September 1966 at the Sheraton-Cleveland and the pilot premier of Star Trek.Gene Roddenberry
Eugene Wesley Roddenberry (August 19, 1921 – October 24, 1991) was an American television screenwriter, producer and creator of the original Star Trek television series, and its first spin-off The Next Generation. Born in El Paso, Texas, Roddenberry grew up in Los Angeles, where his father was a police officer. Roddenberry flew 89 combat missions in the Army Air Forces during World War II, and worked as a commercial pilot after the war. Later, he followed in his father's footsteps and joined the Los Angeles Police Department, where he also began to write scripts for television.
As a freelance writer, Roddenberry wrote scripts for Highway Patrol, Have Gun–Will Travel, and other series, before creating and producing his own television series The Lieutenant. In 1964, Roddenberry created Star Trek, which premiered in 1966 and ran for three seasons before being canceled. He then worked on other projects, including a string of failed television pilots. The syndication of Star Trek led to its growing popularity; this, in turn, resulted in the Star Trek feature films, on which Roddenberry continued to produce and consult. In 1987, the sequel series Star Trek: The Next Generation began airing on television in first-run syndication; Roddenberry was heavily involved in the initial development of the series, but took a less active role after the first season due to alcoholism and ill health. He continued to consult on the series until his death in 1991.
In 1985, he became the first TV writer with a star on the Hollywood Walk of Fame, and he was later inducted by both the Science Fiction Hall of Fame and the Academy of Television Arts & Sciences Hall of Fame. Years after his death, Roddenberry was one of the first humans to have his ashes carried into earth orbit. The popularity of the Star Trek universe and films has inspired films, books, comic books, video games, and fan films set in the Star Trek universe.Phyllis Eisenstein
Phyllis Eisenstein (born February 2, 1946) is an American author of science fiction and fantasy short stories and novels whose work has been nominated for both the Hugo Award and Nebula Award.Tricon
Tricon may refer to:
Tricon Global Restaurants, Inc., now known as Yum! Brands
The 24th World Science Fiction Convention, also known as Tricon
Tricon Containers - US Military cargo containers where 3 can be connected to make one 20 foot shipping container.
TRicon - Something or a piece of creation with multiple value, MultiValue also known as TRicon