FireWire is Apple Inc.'s brand name for the IEEE 1394 interface (although the 1394 standard also defines a backplane interface). It is also known as i.LINK (Sony's name) and DV (Panasonic's name, not to be confused with DV camcorder tapes). It is a serial bus interface standard, for high-speed communications and isochronous real-time data transfer, frequently used in a personal computer (and digital audio and digital video).

FireWire has replaced Parallel SCSI in many applications, due to lower implementation costs and a simplified, more adaptable cabling system. IEEE 1394 has been adopted as the High Definition Audio-Video Network Alliance (HANA) standard connection interface for A/V (audio/visual) component communication and control . FireWire is also available in wireless, fiber optic, and coaxial versions using the isochronous protocols.

Almost all modern digital camcorders have included this connection since 1995. Since 2003 many computers intended for home or professional audio/video use have built-in FireWire/i.LINK ports, including all Sony computers, all but one of Apple's computers (and many of its older iPods), and most Dell and HP models currently produced. It is also available on many retail motherboards for do-it-yourself PCs.