A **configuration space** is an isomorphism between the *attributes* of something, and its *position* on a multidimensional graph. Theoretically, the attributes and precise position on the graph should contain the same information. In practice, the concept usually appears as a suffix, as in "walletspace", where "walletspace" refers to the configuration space of all possible wallets, arranged by similarity. Walletspace would intersect with leatherspace, and the set of leather wallets is a subset of both walletspace and leatherspace, which are both subsets of thingspace.

- Similarity Clusters
- The Cluster Structure of Thingspace
- Disguised Queries
- Neural Categories
- Mutual Information, and Density in Thingspace
- Classical Configuration Spaces