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1) Компьютерная техника: Data Operation, Domain Object, Dynamic Object

2) Авиация: data output, drop out

3) Военный термин: Deep Operations, Dental Officer, Director of Operations, Directorate of Operations, defense order, delivery order, deputy for operations, digital output, direct order, disbursing officer, divisional order, due-out, duty officer, Director of Ops (USAF)

4) Техника: deviating oscillator, dipole orientation, direct oxidation, drilling-out, drying oil, принятое в США обозначение корпуса полупроводниковых приборов с двумя выводами

5) Финансы: development objectives

6) Телевидение: dropout

7) Сокращение: Delivery Office (UK, 2006), Directorate of Operations (USA), Divisional Officer (UK Royal Navy), Dominican Republic, draw out, доктор остеопатии (Doctor of Osteopathic Medicine), DCS/Operations, Dark One (Wheel of Time series), Data Object, Data Out, Dawson and Oberman (plasmas), Defined Order, Denominacion de Origen (general identification for Spanish wines), Deportation Order, Design Objective, Design Overview, Designated Official, Desk Officer (NYPD), Desktop Originator, Detention Officer, Determination Order (workers compensation claims), Development Officer, Dia'rio Oficial (Official Gazette; Brazil), Diatomic Orbital, Diffractive Optics (camera lenses technology), Digital Orthophoto (FEMA), Diode Outline, Direct Object, Director Officer, Directorate of Operations (US CIA), Disbursement Order, Disbursing Order, Disciplined Oscillator, Disorder, Dispensing Optician, Disto-Occlusal (dentistry), Distortion Offset, Distributed Object, Distributed Operations, District Office, District Officer, Division Officer, Division Operator, Doctor of Osteopathic Medicine, Doctor of Osteopathy, Doctor of Otolaryngology, Dominica, Dornier (German aircraft manufacturer), Drift Orbit, Driver Only (train operated by the driver only), Ombudsmannen mot Etnisk Diskriminering (the Swedish national ombudsman for issues on ethnic discrimination), Operational Dependability, Operations Directorate (NIMA), US Duty Officer

8) Электроника: Dynamic optimization

9) Вычислительная техника: Distributed Objects (NeXT), цифровой устройство вывода, цифровые выходные данные

10) Нефть: development oil, drill out, drilling obligation, drilling out, выбуривание (drilling out), дизельное топливо (diesel oil), нефть из разрабатываемого пласта (development oil), прямое окисление (метод испытания керосина на степень очистки), разбуривание (drilling out)

11) Банковское дело: заказ на поставку (delivery order)

12) Экология: dissolved oxygen

13) Бурение: эксплуатационная газовая скважина (development gas well)

14) Сетевые технологии: Data Only

15) Полимеры: diesel oil

16) Сахалин Р: Digital Output

17) Химическое оружие: discrete output

18) Макаров: drawing office

19) Расширение файла: Distributed Objects

20) Автоматическое регулирование: цифровой выход (digital out)

21) НАСДАК: Ditto (Usually a Horizontal Ditto)

22) NYSE. Diamond Offshore Drilling, Inc.