Wal-Mart pioneered the retail "hub-and-spoke" distribution system in the 1970s, centrally ordering goods at warehouses then dispatching to individual stores. This enabled significant cost savings through bulk purchasing and logistics efficiencies. Wal-Mart also emphasized reducing costs through direct procurement from manufacturers and transparency in the pricing process. The company made major investments in inventory tracking technologies like EDI, RFID, and a proprietary satellite system to monitor sales and replenish stocks in real-time.