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  2. Estimated time of arrival - Wikipedia

    en.wikipedia.org/wiki/Estimated_Time_of_Arrival

    [citation needed] In this respect, the phrase or its abbreviation is often paired with its complement, estimated time of departure (ETD), to indicate the expected start time of a particular journey. This information is often conveyed to a passenger information system as part of the core functionality of intelligent transportation systems .

  3. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    B or b – prefix denoting a number in billions; BA – bottom assembly (of a riser) bbl – barrel bbl/MMscf – barrels per million standard cubic feet

  4. End-of-train device - Wikipedia

    en.wikipedia.org/wiki/End-of-train_device

    In most cases, the engineer is able to use information from the ETD to verify that the air pressure reduces and increases at the rear of the train accordingly, indicating proper brake pipe continuity. This device is said to constitute a fail-safe condition. The DPS ETD reduced labor costs, as well as the costs of the purchase and upkeep of ...

  5. ETD - Wikipedia

    en.wikipedia.org/wiki/ETD

    ETD may refer to: Science and technology. Eustachian tube dysfunction, a disorder of the middle ear; Everhart–Thornley detector; Explosives trace detector or ...

  6. List of business and finance abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_business_and...

    Among other things, the value of Ke and the Cost of Debt (COD) [6] enables management to arbitrate different forms of short and long term financing for various types of expenditures. Ke applies most prominently to companies that regularly generate excess capital (free cash flow, cash on hand) from ongoing operations.

  7. Explosives trace detector - Wikipedia

    en.wikipedia.org/wiki/Explosives_trace_detector

    Explosives trace detectors (ETD) are explosive detection equipment able to detect explosives of small magnitude. The detection is accomplished by sampling non-visible "trace" amounts of particulates. The detection is accomplished by sampling non-visible "trace" amounts of particulates.

  8. List of aviation, avionics, aerospace and aeronautical ...

    en.wikipedia.org/wiki/List_of_aviation,_avionics...

    ETD estimated time of departure [1] ETE estimated time en route [1] ETL effective translational lift: ETOPS Extended-range Twin-engine Operation Performance Standards: ETSO European Technical Standard Order, issued by EASA; see TSO: EUROCAE European Organisation for Civil Aviation Equipment: EVAS Emergency Vision Assurance System EVSI

  9. Electron-transfer dissociation - Wikipedia

    en.wikipedia.org/wiki/Electron-transfer_dissociation

    Electron-transfer dissociation (ETD) is a method of fragmenting multiply-charged gaseous macromolecules in a mass spectrometer between the stages of tandem mass spectrometry (MS/MS). [1] Similar to electron-capture dissociation , ETD induces fragmentation of large, multiply-charged cations by transferring electrons to them. [ 2 ]