| Subject | English | Spanish |
| comp., MS | change unit | unidad de cambio (The minimal unit of change tracking in a store. In change propagation, only the units that are changed must be sent; whereas, in conflict detection, independent changes to the same unit are considered a conflict) |
| mech.eng. | engine change unit | motor de instalación rápida |
| mech.eng. | engine change unit | motor equipado |
| mech.eng. | engine change unit | cambio de motor |
| mech.eng. | engine change unit | motor de cambio rápido |
| mech.eng. | engine change unit | motor QEC |
| mech.eng. | quick-engine change unit | motor de instalación rápida |
| mech.eng. | quick-engine change unit | motor QEC |
| mech.eng. | quick-engine change unit | motor de cambio rápido |
| industr., construct. | yarn-changing unit | mecanismo para hacer listados en el tejido |