IBM is announcing an initiative with the University of Pennsylvania to build a grid of computers running Linux, AIX, and Windows for breast cancer screening and detection: “Once a patient’s mammograms are loaded into the system, they can be evaluated with powerful tools that isolate abnormalities very quickly by comparing current X-rays with those from previous years,” said Dr. Robert Hollebeek, director of the university’s National Scalable Cluster Lab. From the article, it appears that Linux will be doing the heavy lifting at the ‘regional hub’ level.