presentations by the Guests of Honor and other program participants. Other business of the World Science Fiction Society, including voting on the location of future Worldcons and North American Science Fiction Conventions (NASFiCs, which occur when the Worldcon is overseas) and any changes to the WSFS Constitution, which are made at WSFS business meetings during the convention. Awards The World Science Fiction Society administers and presents the Hugo Awards, the oldest and most noteworthy award for science fiction. Selection of the recipients is by vote of the Worldcon members. Categories include novels and short fiction, artwork, dramatic presentations, and various professional and fandom activities. Other awards may be presented at Worldcon at the discretion of the individual convention committee. This has often included the national SF awards of the host country, such as the Japanese Seiun Awards as part of Nippon 2007, and the Prix Aurora Awards as part of Anticipation in 2009. The Astounding Award for Best New Writer and the Sidewise Award, though not sponsored by the Worldcon, are usually presented, as well as the Chesley Awards, the Prometheus Award, and others. Guests of Honor Each Worldcon committee selects a number of guests of honor (or "GoHs") for the convention. Typically there is an author (aka "Writer" or "Pro") and a fan guest of honor. Many conventions also have artist, editor, and science guests, and most have a toastmaster for major events, such as the opening and closing ceremonies and the Hugo award ceremony. A few conventions have had two or even three author guests. While other conventions may select guests on the basis of current popularity, Worldcons typically 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. Selection is treated by authors, fans, and others as a recognition of lifetime achievement. As such, the tradition is to award it only to those who have been making significant contributions for at least 20 years. Guests of honor generally receive travel expenses, membership, and a small per diem from the convention, but no speaking fees. In order to announce guests immediately after site selection, Worldcon bid committees select one or more guests before the site selection vote. Fans consider it inappropriate for bids to compete on the basis of