As an example, consider the diagram above. According to this model, this consumer would be most satisfied with any combination of products along curve U3. The consumer would be indifferent between combination (Qa1, Qb1) and (Qa2, Qb2). A series of indifference curves is sometimes called an indifference curve map.
For other uses, see Firewire (disambiguation). 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, which called it FireWire. The 1394 interface is also known by the brand i.LINK (Sony), and Lynx (Texas Instruments).
FireWire devices can be powered or unpowered. FireWire allows devices to draw their power from their connection. Two power conductors in the cable can supply power (8 to 30 volts, 1.5 amps maximum) from the computer to an unpowered device. Two twisted pair sets carry the data in a FireWire 400 cable using a 6-pin configuration.