A set of standards that define digital broadcasting using existing satellite, cable, and terrestrial infrastructures. 

An optical disc technology with a 4.7 gigabyte storage capacity on a single-sided, one-layered disk, which is enough for a 133-minute movie. DVDs can be single- or double-sided, and can have two layers on each side.

A digital enhancement of the Video Home System (VHS) videocassette recording (VCR). D-VHS allows for the recording and reproduction of up to four hours of digital high-definition television (HDTV) programming at 720 or 1080 lines per frame. 

A software application, usually for a smart phone, that serves as an electronic version of a physical wallet.

A digital version of AMPS (Advanced Mobile Phone Service). D-AMPS adds time division multiple access (TDMA) to AMPS to get three channels for each AMPS channel, tripling the number of calls that can be handled on a channel. 

A digital enhancement of the Video Home System (VHS) videocassette recording (VCR) technology that was developed by Japan Victor Company (JVC) in 1976. D-VHS is a joint effort among JVC, Hitachi, Matsushita, and Sony.

A specialized form of slivercasting in which video or multimedia content is displayed in public places for informational or advertising purposes. A digital sign usually consists of a computer or playback device connected to an LCD or plasma display.

An electronic signature that can be used to authenticate the identity of the sender of a message or the signer of a document, and possibly to ensure that the original content of the message or document that has been sent is unchanged.

The process of converting information into a digital format . Information is organized into discrete units of data (bits) that can be separately addressed. This is the binary data that computers and many devices with computing capacity can process.

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A magazine that is delivered in digital (electronic form) on an electronic medium, such as a CD-ROM. A digizine can be stand-alone or used as a supplement to printed information or information on a Web site.

Dimensional modeling (DM) is the name of a set of techniques and concepts used in data warehouse design. It is considered to be different from entity-relationship modeling (ER).

A table in a star schema of a data warehouse. A dimension table stores attributes, or dimensions, that describe the objects in a fact table. In data warehousing, a dimension is a collection of reference information about a measurable event. 

The ability to obtain data from a storage device by going directly to where it is physically located on the device rather than by having to sequentially look for the data at one physical location after another. 

A network file system, similar to NFS and CIFS, that allows applications to transfer data while bypassing operating system control, buffering, and network protocol operations that can bottleneck throughput.