Priism is a collection of tools for processing, analyzing, and visualizing multidimensional imagery with a focus on 3D wide-field optical microscopy and EM tomography. IVE (Image Visualization environment) is the core set of software libraries that are the foundation for the tools in Priism. The two are available as a package for x86 and x86_64 Linux and Mac OS X for Intel. To obtain them, visit http://msg.ucsf.edu/IVE/Download/. Instructions for how to license a version with Muthuvel Arigovindan's ER-Decon algorithm are also there; visit http://msg.ucsf.edu/IVE/Download/index.html#ER-Decon.