DI Computing Abbreviation

Direct Input

Disk Interface

Hard disk drives are accessed over one of a number of bus types, including as of 2011 parallel ATA, Serial ATA, SCSI, Serial Attached SCSI, and Fibre Channel. Bridge circuitry is sometimes used to connect hard disk drives to buses with which they cannot communicate natively, such as IEEE 1394, USB and SCSI.

Drop and Insert

Dielectric Isolation

Disk Image

A disk image is a software copy of a physical disk. It saves the entire data from the disk, including the file structure and all files and folders from the disk, in a single file. Because disk images are exact copies, or "clones," of original disks, they can be used to duplicate disks or serve as full backups in case a system restore must be done. Disk images can be created from both hard disks and optical media, such as CDs and DVDs.

Document Imaging

Document Index

Dynamic Imaging

Destructive Interference

The complete out-of-phase interaction of photons, that is, their collision in such a way that their intensities cancel. In x-ray crystallography, destructive interference of x-ray photons causes areas without spots (reflections) in the diffraction pattern.