PSI Aktiengesellschaft fuer Produkte und Systeme der Informationstechnologie is a Germany-based company that develops and integrates software for energy suppliers, manufacturers and infrastructure operators. It operates through three segments. The Energy Management segment serves utility companies in the electricity, gas, oil, water, district heating and combined energy sectors, and focuses on solutions for grid management, energy storage, energy trading and virtual power plants. The Production Management segment provides software for production planning, production control and logistics for the metal industry, machinery and plant engineering, the automotive industry and logistics. The Infrastructure Management segment develops control system software for the operation of infrastructure in the areas of rail and road transport and public safety with focus on operation-control technology, depot management and safety and telematics applications.