| Subject | English | Welsh |
| comp., MS | source area | ardal ffynhonnell (A cell range that you consolidate in the destination area you specify) |
| comp., MS | source data | data ffynhonnell (The list or table that's used to create a PivotTable or PivotChart report. Source data can be taken from an Excel list or range, an external database or cube, or another PivotTable report) |
| comp., MS | source file | ffeil ffynhonnell (A file that contains the data that a program will process and store in a destination file) |
| comp., MS | Source Manager | Rheolwr Ffynhonnell (A dialog box that allows users to add/remove/organize the list of bibliographic information for the document) |
| comp., MS | source subscription | tanysgrifiad gwreiddiol (A subscription that is canceled to create a new subscription as a result of a conversion or merge) |