Hot Neuron LLC, an information retrieval software and services company, announced the release of version 2.0 of its Clustify document clustering software, featuring automatic document categorization, and other tools to help corporations and law firms explore and organize large document sets. Clustify automatically categorizes new documents based on the categories assigned to similar documents in the past. Documents that aren't sufficiently similar to previously categorized documents are put into clusters for manual processing. Other features added since version 1.0 include: keyboard shortcuts for manual categorization, the ability to drag and drop one document onto another to display a side-by-side comparison that highlights common text, options for greater control over the clustering process, and handling of additional file formats on Windows via the same IFilter technology that is used in Microsoft's search products. Clustify can generate concept-based clusters, or it can require documents in the same cluster to contain identical passages of text in order to detect near-duplicates.