| Subject | English | Korean |
| comp., MS | Internet Relay Chat | 인터넷 릴레이 채팅 (A service that enables an Internet user to participate in a conversation online in real time with other users) |
| IT | mail relay server | 메일 릴레이 서버 |
| comp., MS | media relay server | 미디어 중계 서버 (A server, in the perimeter network, that has two separate network interfaces or edges (one for accepting connections from internal clients and another for accepting connections from external clients) and that is used to enable applications to pass audio and video data across NATs and firewalls) |
| comp., MS | relay host | 릴레이 호스트 (A designated server through which Exchange routes all outgoing messages. The smart host then makes the remote connection. If a smart host is designated, the Exchange server only needs to transmit to the smart host, instead of repeatedly contacting the domain until a connection is made) |
| comp., MS | relay port | 릴레이 포트 (A type of class port that defines the internal and external ports of an actor class. Can appear only on the border of an actor class. Relay ports relay incoming messages to a contained actor or outgoing messages from a contained actor) |