| Subject | Spanish | English |
| polit. | Actos, Foros y Open Days | Unit D2 |
| polit. | Actos, Foros y Open Days | Events, Fora, Open Days |
| textile | cilindro abridor de turbina open end | opening roller |
| comp., MS | formatos Office Open XML | Open XML formats (An international open standard for word-processing documents, presentations, and spreadsheets that can be freely implemented across multiple applications and platforms) |
| comp., MS | formatos Office Open XML | Office Open XML formats (An international open standard for word-processing documents, presentations, and spreadsheets that can be freely implemented across multiple applications and platforms) |
| IT | fundación "Open Systems Foundation" | Open Software Foundation |
| textile | hilatura open end | open end spinning |
| textile | hilatura open end | break spinning |
| textile | hilo open end | open end yarn |
| engl. | Open Diagnostic Data Exchange | Open Diagnostic Data Exchange |
| fin. | open house | open house (use el termino en inglés) |
| hobby, IT | Open Network Provision | ONP Committee |
| fin. | título del "open market" | open-market security |