Why Reliable Office Technologies Corp? We're a locally owned, independent business, whose owners and managers have more than 50 years of combined experience in the document management industry. Reliable Office Technologies Corporation (ROTC, now merged with our sister company, Digital Supply Corporation) works hard to maintain a complete and diverse line of software solutions, Sharp and Xerox products, service and supplies. Providing products from multiple vendors, including Sharp Corporation’s award winning multifunctional line and Xerox Corporation's exceptional printing solutions. ROTC offers a full line of corporate equipment, software, training, support and service.