| Subject | English | Spanish |
| comp., MS | Explicit Congestion Notification | Notificación explícita de congestión (A frame relay network technology for, monitoring and adapting to the network bandwidth available for delivery of data packets between source and destination nodes. Either the source or the destination node may set a bit in a packet header to request that the transmission or request rate be decreased) |
| el. | forward explicit congestion notification | notificación explícita de congestión hacia adelante |