| Subject | English | Welsh |
| comp., MS | security group identifier | dynodwr grŵp diogelwch (An integer that uniquely identifies a security group from all other security principals and site groups within the same site collection) |
| comp., MS | security identifier | dynodwr diogelwch (In Windows-based systems, a unique value that identifies a user, group, or computer account within an enterprise. Every account is issued a SID when it is created) |