The award was first presented in 1973, and was given annually through 2006. Beginning in 2007, the award was split into two categories, that of Best Editor (Short Form) and Best Editor (Long Form). The Short Form award is for editors of anthologies, collections or magazines, while the Long Form award is for editors of novels. In addition to the regular Hugo awards, beginning in 1996 Retrospective Hugo Awards, or "Retro Hugos", have been available to be awarded for years 50, 75, or 100 years prior in which no awards were given. To date, Retro Hugo awards have been awarded for 1939, 1941, 1943—1946, 1951, and 1954, and in each case an award for professional editor was given.