| Subject | English | Spanish |
| auto. | master cylinder primary cup | copa sello primaria del cilindro maestro |
| comp., MS | primary master | maestro principal (An authoritative DNS server for a zone that can be used as a point of update for the zone. Only primary masters have the ability to be updated directly to process zone updates, which include adding, removing, or modifying resource records that are stored as zone data. Primary masters are also used as the first sources for replicating the zone to other DNS servers) |