| Subject | English | Spanish |
| fishery | local operating unit | unidad operativa local |
| comp., MS | operating unit | unidad operativa (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) |
| comp., MS | operating unit | unidad operativa (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) |
| commun. | operating unit for automation of composing machines | unidad operacional para la automatización de las máquinas de componer |
| mater.sc. | unit operating duty period | período de funcionamiento bajo esfuerzo |