| Subject | English | Irish |
| market., commun. | absolute return required by operator | dearbhtháirgeacht arna héileamh ag an oibreoir |
| market., commun. | absolute return required by operator | dearbhthoradh arna éileamh ag an oibreoir |
| med., unions. | acceptable operator exposure level | leibhéal na neamhchosanta atá inghlactha ag an oibreoir |
| comp., MS | addition operator | oibreoir suimiúcháin (The + character, used to indicate addition or a positive number) |
| UN | addressograph operator | oibreoir seoladhghraif |
| transp., avia. | air operator | aeriompróir |
| transp., avia. | air operator | aerlíne |
| transp., avia. | air operator | aeroibreoir |
| transp., avia. | air operator certificate | teastas aeroibreora |
| transp., avia. | air operator's certificate | teastas aeroibreora |
| transp., avia. | air transport operator | aeriompróir |
| transp., avia. | air transport operator | aerlíne |
| transp., avia. | aircraft operator | oibreoir aerárthaigh |
| transp., avia., environ. | aircraft operator holding account | cuntas coinneála oibreora aerárthaigh |
| transp., avia. | airport operator | comhlacht bainistithe aerfoirt |
| econ., cust. | Authorised Economic Operator | oibreoir eacnamaíochta údaraithe |
| gen. | authorised economic operator for customs simplifications | oibreoir eacnamaíoch údaraithe "simplithe custaim" |
| gen. | authorised economic operator for security and safety | oibreoir eacnamaíoch údaraithe "slándála agus sábháilteachta" |
| busin. | casino operator | oibreoir casaíne |
| transp. | combined transport operator | oibreoir iompair traschórais |
| comp., MS | comparison operator | oibreoir comparáide (A character or symbol that indicates a relationship between two or more values or expressions - for example, < (less than), > (greater than), and = (equal to)) |
| gov., IT, empl. | console operator | oibreoir consóil |
| transp. | control tower operator | rialtóir aerthráchta |
| gen. | Convention on the Liability of Operators of Nuclear Ships | an Coinbhinsiún maidir le Dliteanas Oibreoirí Long Núicléach |
| market., commun. | cross-border interconnection between operators of established networks | idirnasc trasteorann idir oibreoirí líonraí bunaithe |
| market., commun. | cross-border interconnection between operators of established networks | idirnasc trasteorann idir oibreoirí de líonraí bhunaithe |
| gen. | customs simplification authorised economic operator | oibreoir eacnamaíoch údaraithe "simplithe custaim" |
| gen. | DRG operator | oibreoir córais don treoraíocht dhinimiciúil de bhóthar |
| gen. | dynamic route guidance system operator | oibreoir córais don treoraíocht dhinimiciúil de bhóthar |
| commun. | European Telecommunications Network Operators' Association | an Comhlachas Eorpach d'oibreoirí líonraí teileachumarsáide |
| energ.ind. | European Transmission System Operators | Oibreoirí Chórais Tarchurtha na hEorpa |
| agric. | farm operator | oibreoir feirme |
| commun., IT | flight operator | oibreoir eitilte |
| market. | franchise chain operators | oibreoirí i sraith saincheadúnas |
| energ.ind. | independent system operator | oibreoir córais neamhspleách |
| environ. | landfill operator | oibreoir |
| law | legal certainty for operators | deimhneacht dhlíthiúil d'oibreoirí |
| fin. | market operator | rannpháirtí sa mhargadh |
| comp., MS | mobile operator | oibreoir móibíleach (A company that provides telephone and other communications services to consumers) |
| commun., transp., avia. | Mode S operator | oibreoir Mhód S |
| transp. | multimodal transport operator | oibreoir iompair ilmhódaigh |
| commer. | notified operator | oibreoir arna chur in iúl |
| agric. | official register of professional operators | clár oifigiúil oibreoirí gairmiúla |
| agric. | official register of professional operators | clár oibreoirí gairmiúla |
| agric. | official register of professional operators | clár |
| comp., MS | operator account | cuntas oibreora (The account of the user who is managing the import process for a deployment package) |
| ecol. | operator holding account | cuntas coinneála oibreora |
| transp., mil., grnd.forc. | operator of a service facility | oibreoir saoráide seirbhísí |
| market., commun. | operator's cost of capital | costas caipitil an oibritheora |
| market., commun. | operator services costs | costas seirbhísí oibritheora |
| commun., commer. | operator with significant market power | oibreoir a bhfuil cumhacht shuntasach sa mhargadh aige |
| polit., agric. | professional operator | oibreoir gairimiúil |
| agric. | professional operator | oibreoir gairmiúil |
| commun., empl., transp. | radio operator | oibreoir raidió |
| gen. | radio operator | oifigeach raidió |
| commun., econ. | reasonably efficient operator test | tástáil iomaitheora atá réasúnta éifeachtúil |
| agric. | register of professional operators | clár |
| agric. | register of professional operators | clár oibreoirí gairmiúla |
| agric. | register of professional operators | clár oifigiúil oibreoirí gairmiúla |
| gen. | security and safety authorised economic operator | oibreoir eacnamaíoch údaraithe "slándála agus sábháilteachta" |
| market., commun. | statutory accounts of the operator | cuntais reachtúla an oibreora |
| transp., nautic. | terminal operator | oibreoir críochfoirt |
| hobby | tour operator | tionscnóir turas |
| transp. | transport operator | iompróir |
| law, transp. | transport vehicle operator's licence | ceadúnas tiomána um fheithicil iompair |
| energ.ind., polit. | World Association of Nuclear Operators | Comhlachas Domhanda na nOibreoirí Núicléacha |