Originally posted by anarchy
As for Firewire....
Firewire-MAC (but PC compatible)
Clarification: Firewire was a joint venture project by Sony, Apple, Texas Instruments and a couple other companies, thought the patents are held jointly by Apple and Sony, who hold separate trademarks on their proprietary names for the spec: "Firewire" for Apple and "i.Link" for Sony. Since it is an IEEE Ratfied spec (IEEE1394) and has its own host controller on chip, it is platform independent.
should tell you everything you want to know.
USB, on the other hand, was created by Intel and thus was a PC spec ported