D-One Car Sharing is an innovative fleet management solution designed specifically for businesses. D-One software and mobile application offer businesses the opportunity to easily share pool tools within the company and manage them efficiently among personnel and departments. Thanks to the reservation and vehicle assignment system, vehicle use becomes easier, fleet management becomes more effective with detailed reports, and maximum benefit is achieved with minimum vehicles. D-One Car Sharing contributes to sustainable business management by promoting an environmentally friendly approach while providing businesses with time and cost savings.