| Subject | English | Welsh |
| comp., MS | Web Part identifier | dynodwr Rhan Gwe (A GUID that identifies a Web Part) |
| comp., MS | Web Part type identifier | dynodwr math o Ran Gwe (A unique 16-byte value that is assigned to each Web Part type) |
| comp., MS | Web Part zone identifier | dynodwr cylchfa Rhan Gwe (A string that identifies a Web Part zone on a Web Parts page) |