| Subject | English | Welsh |
| comp., MS | ActiveX control | rheolydd ActiveX (A software control that incorporates ActiveX technology) |
| comp., MS | ActiveX Data Objects | Gwrthrychau Data ActiveX (A data access interface that communicates with OLE DB-compliant data sources to connect to, retrieve, manipulate, and update data) |
| comp., MS | ActiveX object | gwrthrych ActiveX (An object supplied by a component that supports Automation) |