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

    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.

  • distributed antenna system (DAS)

    A distributed antenna system (DAS) is a way to deal with isolated spots of poor coverage inside a large building by installing a network of relatively small antennas throughout the building to serve as repeaters.

  • DoCoMo (NTT DoCoMo)

    DoCoMo, also known as NTT DoCoMo, is a Japanese communications corporation that has introduced a line of cell phone sets that contain the equivalent of a digital smart card.

  • downlink and uplink

    These terms should not be confused with downstream and upstream.

  • drive-by spamming

    Drive-by spamming is a variation of drive-by hacking in which the perpetrators gain access to a vulnerable wireless local area network (WLAN) and use that access to send huge volumes of spam.

  • Dropbox

    Dropbox is a cloud storage provider (sometimes referred to as an online backup service) that is frequently used as a file-sharing service.

  • dual persona (mobile device management)

    Dual persona, in a mobile management context, is the provisioning and maintenance of two separate and independent end user environments on a single mobile device. Dual persona technology addresses one of the challenges of the bring your own device trend: how to exercise IT control over employees' personal devices without infringing on their right to privacy.

  • E

    E Ink (eInk)

    E Ink is an electronic device that is similar to a computer display, but with qualities that enable it to be used for applications such as eBooks, electronic newspapers, portable signs, and foldable, rollable displays.

  • e-paper (radio paper or electronic paper)

    E-paper (sometimes called radio paper or just electronic paper) is a portable, reusable storage and display medium that looks like paper but can be repeatedly written on (refreshed) - by electronic means - thousands or millions of times.

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