| Subject | English | Bulgarian |
| comp., MS | persistent chat | постоянен чат (A type of chat in which messages are posted to a chat room where they can be viewed and responded to in real time by multiple participants. Users can search for other rooms by name, member/owner, keywords, and content across groups from Lync) |
| comp., MS | secret chat room | тайна стая за чат (In the Lync persistent chat feature, a room that has been set up with the most restricted level of privacy. Only members of a secret chat room can find it, see who is participating in it, follow it, or read and post in it) |
| comp., MS | Web chat | уеб чат (A content descriptor developed by Microsoft) |