Until recently, it was normal practice at laboratory animal scientific meetings for the organising association to offer its own members a lower registration fee than was applied to non-members, including those non-members who were members of other organizations affiliated to ICLAS This practice was first formally called into question at a meeting of the ICLAS General Assembly held in Seattle in 2003. The argument was that a two-tier system of registration that financially discriminated against members of other ICLAS member organisations acted as disincentive, particularly for foreign representatives, to attend meetings. As such, the practice was contrary to two of the ICLAS aims as laid down in the 2003 ICLAS constitution, namely: A proposal was therefore made to replace the two-tier system with reciprocal registration. Under this practice, ICLAS members would be required to offer their own member registration rate to members of other ICLAS member organisations. The implementation of this proposal would hopefully attract new ICLAS members and lead to an increase in the number of foreign ICLAS member representatives at scientific meetings. This in turn would facilitate greater international collaboration in laboratory animal science. Successful reciprocal registration agreements already existed between some associations and those in attendance at the ICLAS Consortium held during the 2004 AALAS meeting were asked to discuss the proposal with their respective organizations with a view to possible implementation as ICLAS policy. cipro pictures This piece is based on two talks I gave in the spring of 2005 -- one at the O'Reilly ETech conference in March, entitled "Ontology Is Over Rated", and one at the IMCExpo in April entitled "Folksonomies & Tags: The rise of user-developed classification." The written version is a heavily edited concatenation of those two talks. 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