The Delta or ‘D’ Ribbon connector combines the virtues of the ribbon-style contact with many of the positive attributes of the common D Sub connector. It is widely used for low speed parallel port connections meeting IEEE 1284-B, such as to connect legacy storage devices, or communications equipment between shelves or cabinets. The 3M 3000 Series, for example, is offered in popular sizes with metal shells for protection from EMI/RFI when mounted at the I/O slot.