 Miamisburg-based Teradata is the world's largest data warehousing and enterprise analytics company, and Richfield-based OEConnection is the world's largest online automotive parts exchange, or OPSX. One Call Now, headquartered in Troy, is the nation's largest information notification service and part of INC Magazine's fastest-growing companies list three years in a row, while OneCommand, headquartered in Mason, is the nation's leading integrated and automated, personalized communications firm.
