| Subject | English | Welsh |
| comp., MS | Anonymous authentication | Dilysu dienw (An authentication mechanism that does not require user accounts and passwords) |
| comp., MS | anonymous user | defnyddiwr dienw (A user who accesses content on a Web site without providing a user login name and password) |
| comp., MS | anonymous user access | mynediad i ddefnyddwyr dienw (The ability to gain access to a Web server on which one does not have an account) |