| Subject | English | Welsh |
| comp., MS | graphical user interface | rhyngwyneb defnyddiwr graffigol (A display format, like that of Windows, that represents a program's functions with graphic images such as buttons and icons. GUIs enable a user to perform operations and make choices by pointing and clicking with a mouse) |
| comp., MS | Multilingual User Interface | Rhyngwyneb Defnyddwyr Amlieithog (A technology that allows for the installation and use of multiple user-interface languages) |
| comp., MS | Telephone User Interface | Rhyngwyneb Defnyddiwr Ffôn (An interface that is used to navigate the menus of a Unified Messaging (UM) system using DTMF or touchtone inputs) |
| comp., MS | user interface | rhyngwyneb defnyddiwr (The portion of a program with which a user interacts) |
| comp., MS | Voice User Interface | Rhyngwyneb Defnyddiwr Llais (An interface that is used to navigate the menus of a Unified Messaging (UM) system using speech inputs) |