| Subject | English | Spanish |
| transp. | flight notification message | mensaje de notificación de vuelo |
| comp., MS | message disposition notification | notificación de disposición del mensaje (A request for disposition information from a recipient after a message has been successfully delivered. The information might include whether the message was displayed, printed, or deleted without display, or if a recipient refused to send notification) |
| comp., MS | notification message | mensaje de notificación (A human-readable message sent by the backend system to the client user) |