| Subject | English | Spanish |
| comp., MS | Exchange services | servicios de Exchange (Exchange-specific services that run on a server that has Microsoft Exchange Server installed) |
| commun. | foreign exchange service | servicio de central telefónica externa |
| ed. | German Academic Exchange Service | Servicio Alemán de Intercambio Académico |
| patents. | money exchange services | servicios de cambio de divisas |
| commun., IT | teleprinter exchange service | servicio télex |
| tech. | teletypewriter exchange service | servicio de teleimpresores con conmutación |