There are more than 1,000 companies selling cyber security product to the Utilities in the U.S. and Canada. That is a daunting number to consider on the buying end of the equation, and a highly competitive market on the product and services end. Competition is heightened by high demand and fairly low barriers to entry. The Protect Our Power’s Cybersecurity Best Practices Project is directed at organizing and analyzing these vendors to make it easier for the Utilities to make good decisions and to pursue Best Practices as defined in the Project. The Taxonomy included here is an attempt to define meaningful Topics under the broad heading of “Cybersecurity.” In general, a Topic relates to a Utility decision area – a Utility would consider addressing the Topic via analyzing the Vendors that can address the Topic/Cybersecurity need. From a Vendor standpoint, Topics are homogeneous within and heterogeneous between.