IEEE 1394
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IEEE 1394 is an interface standard for a serial bus for high-speed communications and isochronous real-time data transfer. It was developed in the late 1980s and early 1990s by Apple in cooperation wi
A 9-pin FireWire 800 connector
4-conductor (left) and 6-conductor (right) FireWire 400 alpha connectors
A PCI expansion card that contains four FireWire 400 connectors
A FireWire 800 ExpressCard
USB
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Universal Serial Bus is an industry standard, developed by USB Implementers Forum, for digital data transmission and power delivery between many types of electronics. It specifies the architecture, in
IEEE 1394
…to operate without a separate power supply. FireWire is also available in Cat 5 and optical fiber versions. The 1394 interface is comparable to USB. USB was developed subsequently and gained much greater market share. USB requires a host controller whereas IEEE 1394 is cooperatively managed by the…
The four wires/contacts of a USB 1.x or 2.0 cable with Standard-A plug.
Two USB 3.0 Standard-A receptacles (left) and two USB 2.0 Standard-A receptacles (right) on a computer's front panel
An early USB mass-storage device (flash drive) with a USB-A type connector
An M.2 (2242) solid-state-drive (SSD) connected into a USB 3.0 adapter connected to computer