In 1994 and 1996, two anthologies of alternate history science fiction involving World Science Fiction Conventions, titled Alternate Worldcons and Again, Alternate Worldcons, edited by Mike Resnick were published.

However, rules changes to lengthen or shorten the period were implemented by selecting two future Worldcons at the 1969 and 1984 conventions, or having the 2005 convention not select any.

His one professional fiction sale appeared in the book Alternate Worldcons, edited by Mike Resnick.

Conventions may host award ceremonies ; Worldcons present the Hugo Awards each year.

Worldcons are generally held near the start of September, and are held in a different city around the world each year.

Worldcons are generally held near the start of September, and are held in a different city around the world each year.

Worldcons are generally held near the start of September, and are held in a different city around the world each year.

Worldcons are generally held near the start of September, and are held in a different city around the world each year.

Worldcons are generally held near Labor Day, and are held in a different city around the world each year.

Worldcons are generally held near the start of September, and are held in a different city around the world each year.

Worldcons are generally held near Labor Day, and in a different city around the world each year.

Worldcons are generally held near Labor Day and in a different city around the world each year.

Worldcons are generally held near Labor Day, and in a different city around the world each year.

Worldcons are generally held near Labor Day, and are held in a different city around the world each year.

Worldcons are generally held near the start of September, and are held in a different city around the world each year.

SF conventions can vary from minimalist " relaxacons " with a hundred or so attendees to heavily programmed events with four to six or more simultaneous tracks of programming, such as WisCon and Worldcons.

While other conventions may select guests on the basis of popularity, Worldcons select guests of honor as an acknowledgement of significant lifetime contribution to the field ; while these are often well-known figures, some committees choose lesser-known figures precisely because the committee feels the guest's accomplishments deserve more recognition from the community.

The main source of revenue is convention membership ; Worldcons also collect fees from exhibiting dealers and artists and advertisers in publications ; some conventions manage to attract sponsorships up to 5 % of total income.

It is commonplace for Worldcon attendees to wear their ribbons from previous Worldcons alongside or below their current Worldcon ribbon, occasionally incurring minor confusion.

As with ribbons, Worldcon attendees will often wear their badges from previous Worldcons alongside or below their current badge.

Because of their size, Worldcons have two layers of management between the chair and the staff.

These may be standalone committees, or they may be organized by an existing local group ; a few groups such as MCFI in Boston and SCIFI ( Southern California Institute for Fan Interests ), Inc. in southern California are permanent corporations set up to run Worldcons ( or other one-off / rotating conventions ) in different years in the same area.

While each convention is run separately by the local committee, an informal and self-selected group of volunteers constitute the " Permanent Floating Worldcon Committee " who volunteer for many Worldcons in different years ; this group offers a measure of institutional continuity to otherwise disparate legal organizations.

He has been a guest of honour at Boskone, Eastercon twice, Finncon, Microcon three times, Minicon ( see List of past Minicons ), Novacon, OryCon twice, Picocon several times, and Worldcon ( see List of Worldcons ).

A pair of SF novels by Gene DeWeese and Robert " Buck " Coulson, Now You See It / Him / Them and Charles Fort Never Mentioned Wombats are set at Worldcons ; the latter includes an in-character " introduction " by Wilson Tucker ( himself a character in the novel ) which is a sly self-parody verging on a self-tuckerization.

For pages about individual Worldcons, see List of Worldcons ( by date ) or List of Worldcons by city.

* WSFS-related activities: The Hugo Award presentation, voting on the location of future Worldcons and the WSFS Business Meetings.

Most Worldcons are held in North America, although they have taken place in the United Kingdom, Germany, Australia, the Netherlands, and Japan.

The 2011 and 2012 Worldcons will be in Reno, Nevada and Chicago, Illinois respectively.

Sites for future Worldcons are determined by voting of the Worldcon membership.

Like most non-media science fiction conventions, all Worldcons are run entirely by volunteers, with no paid staff ; senior committee members devote hundreds of hours ( not to mention thousands of dollars in travel expenses in some cases ) in preparation for a particular convention.

Recent Worldcons have had budgets running close to a million dollars.

Most Worldcons have between five and twelve division heads who form the convention executive.

In order for convention staff and members to quickly identify the function of other staff at the convention, Worldcons use ribbons of differing colors which are attached to convention badges to signify different roles and responsibilities.

The team played home games at Wrigley Field on Chicago's North Side through the 1970 season.

The style moved through literary modernism in the early 1960s to radicalism and dialectical materialism by 1970.

Another factor was Ned Harkness, who was hired as coach in 1970 and was promoted to general manager midway through the season.

The Saints predominantly wore white at home when the club played at Tulane Stadium from 1967 through 1974 ( except in 1969 and 1970 ), forcing opponents to wear dark colors in the subtropical climate of New Orleans.

The three eventually joined forces in London during 1970 – 71 after meeting through mutual friends and decided to form a rock band.

Formed in 1970, the organisation sought to create a " revolutionary " state through armed struggle, and to remove Italy from the North Atlantic Treaty Organization.

Subsequent elections in 1970 and 1974 gave Mancham a small majority in votes, but a large one in seats, through the " first past the post " voting system.

Houston, Texas businessman Bud Adams owned the Oilers since its inception and guided the team through the 1970 AFL-NFL Merger.

After initial military gains, the Biafran forces were pushed back and in 1970 Biafra was reabsorbed into Nigeria after an estimated population of 3 million Biafrans including women and children had been killed through the war starvation policy of the Nigerian Government.

The United States tested twenty different sizes and designs during Project Rover and NASA's NERVA program from 1959 through 1972 at the Nevada Test Site, designated Kiwi, Phoebus, NRX / EST, NRX / XE, Pewee, Pewee 2 and the Nuclear Furnace, with progressively higher power densities culminating in the Pewee ( 1970 ) and Pewee 2.

She continued acting in film and television regularly through the 1960s, when her performances became fewer ; after the release of the British horror film Trog in 1970, Crawford retired from the screen.

In 1970, modern invitational tournaments began with the Southeastern Invitational Tournament, and the circuit expanded through the 1970s, 1980s, and 1990s.

Although the Rail Passenger Service Act of 1970, which established Amtrak, specifically states that " The Corporation will not be an agency or establishment of the United States Government ," the federal government ( through the United States Department of Transportation ) does own all issued and outstanding preferred stock in the company.

Not to be outdone, the rival Daily Mirror sponsored in 1970 the London-Mexico World Cup Rally, linking the stadia of two successive football World Cups, on a route that crossed Europe to Bulgaria and back before shipping out from Lisbon to Rio de Janeiro, after looping around South America, and a run through some of the most frightening sections of Peru's road race, the Camino de los Incas, they wrap it up being shipped to Panama and a final run up Central America.

In terms of social security, the welfare state was significantly expanded through substantial increases in national insurance benefits ( which rose in real terms by 20 % from 1964 to 1970 ) and the creation of new social welfare benefits.

They escape back through the Time Barrier, but instead of returning to St Oswald in their time of 1970, they find themselves in an icy wilderness.

The phrase northern soul was coined by journalist Dave Godin and popularised in 1970 through his column in Blues and Soul magazine.

The remaining pre-war population was treated as Germanized Poles and a policy of re-Polonization was pursued throughout the country Most of these " Autochthones " chose to emigrate to West Germany from the 1950s through 1970s ( between 1970 and 1988 55, 227 persons from Warmia and Masuria moved to Western Germany ).

The Tempest's popularity helped move Pontiac into third place among American car brands in 1962, a position Pontiac would hold through 1970.

Because many miniature vehicles were originally sold as playthings, there is no precise difference between a model car and a toy car, yet the kit building hobby became popular through the 1950s, while the collecting of miniature by adults started to pick up steam around 1970.

The government of Luis Echeverría ( 1970 – 76 ), secretary of interior during the Díaz Ordaz administration, increased social spending, through external debt, at a time when oil production and prices were surging.

He recorded the album with members of Classics IV and released it through Cotillion Records in 1970.

Virtually all episodes of General Hospital, from its premiere in April 1963 through August 1970, are archived at UCLA.