dirty bit n. A bit used to mark modified data in a cache so that the modifications may be carried over to primary memory. See also bit, cache.

-Microsoft Computer Dictionary, 3rd ed.

IRQ conflict n. The condition on a Wintel computer in which two different peripheral devices use the same IRQ to request service from the central processing unit (CPU). An IRQ conflict will prevent the system from working correctly; for example, the CPU may respond to an interrupt from a serial mouse by executing an interrupt handler for interrupts generated by a modem. IRQ conflicts can be prevented by the use of Plug and Play hardware and software. See also interrupt handler, IRQ, Plug and Play.

-Microsoft Computer Dictionary, 3rd ed.