Stichting HAL2001, a not-for-profit organization, holds a quadrennial Dutch hacker convention. They have, so far, held HAL2001 (Hackers at Large) and What the Hack (2005, originally called HEX (referring to the 16th anniversary of the event, as well as an acronym for Hacking Extreme)). The Dutch conferences held prior Stichting HAL2001's existence were Galactic Hacker Party (1989), Hacking at the End of the Universe (1993) and Hacking In Progress (1997), notable for being held simultaneously and in conjunction with Beyond HOPE.