Cummins Inc has introduced PowerSpec, an Internet application that lets Cummins customers inspect their engine's control system and electronic features and allows Signature 600, ISX, and ISM customers to custom-specify electronic features of engines. By following prompts, anyone can tailor specs on a Cummins Interact System (IS) engine. PowerSpec can be accessed via the Cummins web site at www.cummins.com or directly via www.powerspec.cummins.com.