| Subject | English | Spanish |
| comp., MS | multiple activation key | clave de activación múltiple (A volume license key that is used for one-time activation with activation services that are hosted by Microsoft) |
| mech.eng. | multiple keys | chaveteros múltiples |
| el. | multiple phase shift keying | MDP m-valente |
| commun. | multiple phase-shift-keying | MDP m-valente |