| Subject | English | Estonian |
| transp., avia. | aicraft operating manual | õhusõiduki käsiraamat |
| interntl.trade. | Directive 2004/17/EC coordinating the procurement procedures of entities operating in the water, energy, transport and postal services sectors | võrgustiku sektori direktiiv |
| interntl.trade. | Directive 2004/17/EC coordinating the procurement procedures of entities operating in the water, energy, transport and postal services sectors | Euroopa parlamendi ja nõukogu direktiiv 2004/17/EÜ, millega kooskõlastatakse vee-, energeetika-, transpordi- ja postiteenuste sektoris tegutsevate ostjate hankemenetlused |
| transp., avia. | dry operating mass | käitamise tühimass |
| econ. | ECSC operating budget | ESTÜ tegevuseelarve |
| gen. | EU Air Deployable Operating Base | õhuruumis ülesseatav ELi juhtimisbaas |
| gen. | full operating capability | täielik tegevusvõime |
| gen. | full operating capability | täielik operatsioonivõime |
| transp., avia. | helicopter emergency medical service operating base | kopteri kiirabilendude baas |
| transp., avia. | helicopter emergency medical service operating base | kiirabikopterite baas |
| transp., avia. | heliport operating minima | kopteriväljaku käitamismiinimumid |
| transp., avia. | HEMS operating base | kopteri kiirabilendude baas |
| transp., avia. | HEMS operating base | kiirabikopterite baas |
| transp., avia. | HEMS operating site | kopteri kiirabitööde koht |
| gen. | initial operating capability | esmane operatsioonivõime |
| gen. | initial operating capability | esmane tegevusvõime |
| gen. | initial operating capability | esialgne operatiivvõime |
| comp., MS | Microsoft Disk Operating System | Microsofti kettaoperatsioonisüsteem (A Microsoft computer operating system with a command-line interface that is used to control many internal computer functions, such as running programs and organizing and maintaining files) |
| tech., law, el. | minimum stable operating level | stabiilse talitluse miinimumtase |
| tech., law, el. | minimum stable operating level | minimaalne talitluse stabiilsustase |
| comp. | mobile operating system | mobiilseadme operatsioonisüsteem |
| comp. | mobile operating system | mobiiliplatvorm |
| comp., MS | MS-DOS operating system | MS-DOS-i opsüsteem (A Microsoft computer operating system with a command-line interface that is used to control many internal computer functions, such as running programs and organizing and maintaining files) |
| astronaut., transp. | normal operating range | tavapärane töövahemik |
| econ., commer. | operating aid | tegevusabi |
| transp., avia. | operating air carrier | lendu teostav vedaja |
| transp., avia. | operating air carrier | lendu teostav lennuettevõtja |
| fin. | operating appropriation | haldusassigneering |
| fin. | operating appropriation | talitusassigneering |
| fin. | operating budget | tegevuseelarve |
| busin. | operating budget | jooksev büdžett |
| transp., avia. | operating carrier | lendu teostav vedaja |
| transp., avia. | operating carrier | lendu teostav lennuettevõtja |
| math. | operating characteristic | töökarakteristik |
| el. | operating characteristic | käitamiskarakteristik |
| stat. | operating characteristic | operatsioonianalüüs |
| account. | operating charges | tegevuskulud |
| law, commer., polit. | operating concession | kontsessioon |
| econ. | operating cost | tegutsemiskulud |
| account. | operating costs | tegevuskulud |
| transp., avia. | operating crew member | töötav meeskonnaliige |
| environ. | operating data Data referring to the practical carrying-out of a process | käiduandmed |
| environ. | operating data Data referring to the practical carrying-out of a process | käitusandmed |
| busin. | operating enterprise | tegutsev ettevõte |
| fin. | operating entity | tegutsev ettevõtja |
| fin. | operating entity | tegutsev ettevõte |
| fin. | operating expenditure | halduskulud |
| obs., fin. | operating expenditure | talituskulud |
| account. | operating expenses | tegevuskulud |
| econ., fin. | operating income | tegevustulu |
| econ. | operating lease | kasutusrent |
| econ. | operating leasing | kasutusrent |
| transp., avia. | operating licence | lennutegevusluba |
| law, nucl.phys. | operating licence | tegevusluba |
| el. | operating life | eluiga |
| transp., avia. | operating limitations | käitamispiirangud |
| busin. | operating loss | tegevuskahjum |
| busin. | operating loss | tegevuskahju |
| transp., avia. | operating organisation | tehniliste tugiteenuste osutaja |
| law, nucl.phys. | operating permit | tegevusluba |
| transp. | operating procedures | töökord |
| econ. | operating result | põhitegevuskasum |
| econ., fin. | operating revenues | tegevustulu |
| transp., avia. | operating site | käitamiskoht |
| IT | operating speed | töökiirus (näit. elektronarvutil tehet sekundis) |
| comp., MS | operating system | operatsioonisüsteem (The software that controls the allocation and usage of hardware resources such as memory, central processing unit (CPU) time, disk space, and peripheral devices. The operating system is the foundation on which programs are built) |
| IT | operating system | opsüsteem |
| IT | operating system | operatsioonisüsteem (tarkvara osa, programmikomp.leks arvutisüsteemi talitluse juhtimiseks) |
| econ. | operating system | operatsioonisüsteem |
| IT | operating system | operatsioonsüsteem (tarkvara osa, programmikomp.leks arvutisüsteemi talitluse juhtimiseks) |
| forestr. | operating time | kasutusaeg |
| comp., MS | operating unit | tootmisüksus (An organization that divides the control of economic resources and operational processes among people who have a duty to maximize the use of scarce resources, to improve processes, and to account for their performance) |
| el. | operating voltage | talitluspinge |
| med. | operating weight | töömass |
| med. | operating weight empty | töömass |
| econ., commer. | regional operating aid | regionaalne tegevusabi |
| pharma. | Standard Operating Procedure | standardne töökord |
| gen. | standard operating procedures | standardne töökord |