Rhett Allain has published his take on what " computational physics " is. Many of us practicing physicists do work in computational physics. Some very often, some now and then. At some point, many of us have to either analyze data, do numerical modeling, or solve intractable equations. We either use pre-made codes, modify some other computer codes, write our own code, or use commercial software. But certainly, this is less involved than someone who specializes in computational physics. But many