| Subject | English | Portuguese |
| IT | domain name system | Sistema de Nomes de Domínio |
| commun. | domain name system | sistema de nomes de domínio |
| commun., IT | Domain Name System | Sistema de Nome do Domínio |
| comp., MS | Domain Name System | Sistema de Nomes de Domínio (A hierarchical, distributed database that contains mappings of DNS domain names to various types of data, such as IP addresses. DNS enables the location of computers and services by user-friendly names, and it also enables the discovery of other information stored in the database) |
| comp., MS, Braz. | Domain Name System resolver | resolvedor de DNS (A software feature that communicates with DNS servers to create and resolve name-resolution queries. DNS resolvers exist on DNS clients and DNS servers) |
| commun. | internationally recognised and transparent system of management of the domain name system | sistema internacional reconhecido e transparente de gestão dos nomes de domínio |