| Subject | English | Spanish |
| dat.proc. | electronic mail system | mensajería electrónica |
| comp., MS | electronic mail system | sistema de correo electrónico (A utility that allows the user to send and receive e-mail) |
| comp., MS | mail system | sistema de correo (A utility that allows the user to send and receive e-mail) |
| fin. | Remuneration Exchange International Mail System | Acuerdo para la remuneración de entregas obligatorias de envíos transfronterizos |
| comp., MS | voice mail system | sistema de correo de voz (A system that records and stores telephone messages in a user mailbox) |