This GAP package computes cohomology rings for finite p-groups using Jon Carlson's method, both as GAP objects, and also in terms of generators and relators. It also computes induced homomorphisms on cohomology and Massey products in the cohomology ring. To install, download the package from http://math.uic.edu/~marcus/Crime/crime-1.3.tar.gz Put the package in GAP's pkg directory and unpack: tar xvzvf crime-1.3.tar.gz See the documentation in the doc directory for more information. Marcus Bishop marcus.bishop@gmail.com