Mobile Computing Definitions

This glossary explains the meaning of key words and phrases that information technology (IT) and business professionals use when discussing mobile computing and related software products. You can find additional definitions by visiting WhatIs.com or using the search box below.

  • D

    D-AMPS (Digital-Advanced Mobile Phone Service)

    D-AMPS (Digital-Advanced Mobile Phone Service), sometimes spelled DAMPS, is a digital version of AMPS (Advanced Mobile Phone Service), the original analog standard for cellular telephone phone service in the United States.

  • datacard

    A datacard is any removable computer component, approximately the size of a credit card, that contains data, or that contains nonvolatile memory to which data can be written and from which data can be recovered.

  • decibels related to dipole antenna (dBd)

    dBd (decibels related to dipole antenna) is a measure of the gain of an antenna system relative to a dipole antenna at radio frequency.

  • Deep Space Network (DSN)

    The Deep Space Network (DSN) is a sophisticateddata communications system used by the U.S. National Aeronautics and Space Administration (NASA) in conjunction with manned and unmanned space missions.

  • device-agnostic (device agnosticism)

    Device agnostic is a description for computing components that work with various systems without requiring any special adaptations. 

  • digital audio broadcasting (DAB)

  • digital camera

    A digital camera records and stores photographic images in digital form.

  • digital multimedia broadcasting (DMB)

    Digital multimedia broadcasting (DMB) is the process of multicasting by satellite or terrestrial services (or a combination of both) for reception by mobile and portable devices, particularly cell phones... (Continued)

  • digital pen

    A digital pen is a battery-operated writing instrument that allows the user to digitally capture a handwritten note or drawing.

  • Digital Video Broadcasting (DVB)

    Digital Video Broadcasting (DVB) is a set of standards that define digital broadcasting using existing satellite, cable, and terrestrial infrastructures.

  • dipole antenna

    A dipole antenna is a straight electrical conductor measuring 1/2 wavelength from end to end and connected at the center to a radio-frequency (RF) feed line.

  • direct broadcast satellite (DBS)

    Direct broadcast satellite (DBS) refers to satellite television (TV) systems in which the subscribers, or end users, receive signals directly from geostationary satellites.

  • directional sound

    Directional sound is a technology that concentrates acoustic energy into a narrow beam so that it can be projected to a discrete area, much as a laser focuses light... (Continued)

  • disappearing e-mail

    Disappearing e-mail is a message sent using a type of distribution management tool for e-mail.

  • dish antenna

    A dish antenna, also known simply as a dish, is common in microwave systems.

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