Devices are necessary to abide by a protocol so which the interrupt-request (IRQ) traces may be shared. The PCI bus features four interrupt lines, INTA# by means of INTD#, all of which are offered to each product. Up to 8 PCI equipment share exactly the same IRQ line (INTINA# through https://nathanlabsadvisory.com/iso-44001-collaborative-business-relationship-management-systems/