| Subject | English | Catalan |
| comp., MS | asynchronous operation | operació asíncrona (A process whose execution can proceed independently or in the background. Other processes may be started before the asynchronous process has finished) |
| environ. | co-operation | cooperació |
| environ. | co-operation policy Political course of action aiming at establishing trade agreements among the states | política de cooperació |
| environ. | co-operation principle | principi de cooperació |
| environ. | development co-operation | cooperació al desenvolupament |
| environ. | disaster cleanup operation A course or procedure of activity designed to clear the debris or remove harmful substances left by an ecological calamity, natural or human in origin, in a given area | operació de neteja general de desastre |
| environ. | international co-operation The collaboration between governments, businesses or individuals in which it is agreed to work together on similar objectives or strategies, particularly in research or in setting industrial standards | cooperació internacional |
| math. | operations research am. | investigació operativa |
| environ. | scientific co-operation | cooperació científica |