An Order Management System (OMS) in the retail industry is a centralized software solution that automates and streamlines the end-to-end order processing cycle. It integrates with various sales channels, inventory systems, and shipping providers to efficiently manage order capture, inventory tracking, and fulfillment. By providing real-time visibility and coordination across multiple channels, an OMS enhances operational efficiency, reduces errors, and improves customer satisfaction, making it a crucial tool for modern retail businesses.