IEEE 1394. Also known as I link & fire wire is found on some old video cameras and old Macs.
Much rarer than USB you can not get a cable to connect them
FireWire often appears on windows device manager as a network port
Old version 400 newer version 800.
USB has versions 1, 2 & 3
Unless device & PC has FireWire not worth worrying about it
If you have a device which only has FireWire you can get PCI FireWire cards
I am sure if you google 'FireWire wiki' you will find much more details
Regards
Mike Barnes