An anti-systemic library is a type of library that does not have a catalogue, i.e. a hierarchical organisation of knowledge. The idea of an anti-systemic library has been developed in conjunction with Danish Situationist Asger Jorn's notion of Triolectics and the work of the American philosopher Charles Sanders Peirce.
The first anti-systemic library was started at the London Action Resource Centre and soon spread to 24 nodes in 14 countries.
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