PCI Express Terms and Acronyms (One)

8b/10b	The data encoding scheme1 used in the PCI Express Physical Layer.
Access Control Services, ACS	A set of capabilities and control registers used to implement access control over routing within a PCI Express component.
ACS Violation	An error that applies to a Posted or Non-Posted Request when the Completer detects an access control violation.
adapter	Used generically to refer to an add-in card or module.
advertise (Credits)	Used in the context of Flow Control, the act of a Receiver sending information regarding its Flow Control Credit availability.
AER	Advanced Error Reporting (see Section 7.10)
ARI	Alternative Routing-ID Interpretation. Applicable to Requester IDs and Completer IDs as well as Routing IDs.
ARI Device	A multi-Function Device associated with an Upstream Port, capable of supporting up to 256 Functions.
ARI Downstream Port	A Switch Downstream Port or Root Port that supports ARI Forwarding.
asserted	The active logical state of a conceptual or actual signal.