Years ago I was involved with both Loglan (the original) and Lojban (the spin-off, started by a Loglan enthusiast who thought the original creator was being too possessive of Loglan). For me it was simply an entertaining hobby, along with other conlangs such as Láadan and Klingon. But in the history of artificial languages, it is important as the first to be based on the standard universal language of mathematics, first-order predicate calculus.