The International Quantum Structures Association (IQSA) is a society for the advancement and dissemination of structures based on quantum mechanics, in its physical, mathematical, philosophical, applied and interdisciplinary aspects, including the relevant aspects of:

convex structures, logico-algebraic structures, orthomodular structures, quantum logics, empirical logics, operational structures, realistic structures, quantum measurement, quantum geometry, quantum statistics, quantum probability, quantum topology, quantum space time, quantum set theory, quantum information, quantum communication, quantum computation, fuzzy quantum logics

The International Quantum Structures Association was founded in 1990. Since then, the association has organised nine biennial conferences, a satellite conference, and two intermediate conferences. The proceedings of these biennial conferences have all been published as special issues of the International Journal of Theoretical Physics.

The Biennial IQSA Conference Quantum Structures'08 Brussels-Gdansk took place in Sopot, Poland, on July 6-12, 2008, and was jointly organized by the University of Brussels (VUB) and the University of Gdansk. For all information see the website of the conference.
Proceedings of IQSA'08 Brussels-Gdansk will be published in a special issue of International Journal of Theoretical Physics, with guest editors Jaroslaw Pykacz and Bart D'Hooghe.
This information can also be found on the website of the conference via this link.