GeneX Va is a gene expression database supporting storage and analysis of Affymetrix GeneChip technology. It is designed to serve as a secure repository and archive for many researchers' data. It is typically expected to be installed as part of a microarray center; the software is compact enough to install for a single department or even a single user. It includes an Analysis Tree package which includes an ever-expanding set of analytical tools, and has plug-in architecture allowing easy expansion. The "Va" in the name stands for the University of Virginia version, which is a total rewrite of what was originally NCGR's GeneX.