| Subject | English | Spanish |
| mech.eng., el. | asynchronous operation | funcionamiento asíncrono |
| comp., MS | asynchronous operation | operación asincrónica (A process whose execution can proceed independently or in the background. Other processes may be started before the asynchronous process has finished) |
| commun., mech.eng. | asynchronous operation of a sorting machine | funcionamiento arrítmico de una máquina de clasificar |
| el. | asynchronous operation of a synchronous machine | funcionamiento asíncrono de una máquina síncrona |