FireWire is a high-speed data transfer technology developed by Apple in the 1990s. It allows devices like cameras, external hard drives, and computers to connect and transfer data quickly, making it ideal for multimedia applications. FireWire supports multiple devices on a single connection, enabling daisy-chaining. There are two main versions of FireWire: FireWire 400 and FireWire 800. FireWire 400 can transfer data at speeds up to 400 megabits per second, while FireWire 800 doubles that speed to 800 megabits per second. Although it has been largely replaced by USB and Thunderbolt technologies, FireWire is still used in some professional audio and video equipment.