80 conductor IDE cables are needed to enable UDMA speeds (33MB/s +).
Parallel ATA (PATA) is an interface standard for the connection of storage devices such as hard disks, solid-state drives, and CD-ROM drives in computers. The standard is maintained by X3/INCITS committee[1]. It uses the underlying AT Attachment and AT Attachment Packet Interface(ATA/ATAPI) standards. The current Parallel ATA standard is the result of a long history of incremental technical development. ATA/ATAPI is an evolution of the AT Attachment Interface, which was itself evolved in several stages from Western Digital's original Integrated Drive Electronics (IDE) interface. As a result, many near-synonyms for ATA/ATAPI and its previous incarnations exist, including abbreviations such as IDE which are still in common informal use. After the market introduction of Serial ATA in 2003, the original ATA was retroactively renamed Parallel ATA. Parallel ATA only allows cable lengths up to 457.20 mm (18.00 in). Because of this length limit the technology normally appears as an internal computer storage interface. For many years ATA provided the most common and the least expensive interface for this application. By the beginning of 2007, it had largely been replaced by Serial ATA (SATA) in new systems.
The RS-422 EIA-449 interface standard provides a faster data transer rate than the RS-423 EIA-449 interace standard.
The current popular standard is the SATA (serial AT Attachment) interface.
backbone
The most popular consumer internal drive interface is SATA.
yes
HDMI
From Wikipedia definition of IEEE 1394 Standard - "The IEEE 1394 interface is a serial bus interface standard for high-speed communications and isochronous real-time data transfer, frequently used by personal computers, as well as in digital audio, digital video, automotive, and aeronautics applications. The interface is also known by the brand names of FireWire(Apple), i.LINK (Sony), and Lynx (Texas Instruments). IEEE 1394 replaced parallel SCSI in many applications, because of lower implementation costs and a simplified, more adaptable cabling system. The 1394 standard also defines a backplane interface, though this is not as widely used."
desktop
The standard deviation is the standard deviation! Its calculation requires no assumption.
IEEE 1284
EIDE