| Subject | English | Welsh |
| comp., MS | diagnostic provider | darparwr diagnostis (A component that monitors and collects statistics about a system. Those statistics can be compared to a set of thresholds to assess system performance, identify and resolve problems, and perform other diagnostic and administrative tasks) |
| comp., MS | Office Diagnostics | Diagnosteg Office (A feature that may be able to identify the root cause of crashes if an Office application is repeatedly crashing) |
| comp., MS | Windows Diagnostics | Diagnosteg Windows (A feature of Windows that checks for problems associated with network connections) |