| Subject | English | Welsh |
| comp., MS | binary file | ffeil ddeuaidd (A file that contains encoded information that is interpreted according to the application that created it. In general, a binary file can be edited only by the application in which it was created) |
| comp., MS | Binary Interchange File Format | Fformat Ffeil Cyfnewid Deuaidd (The binary file formats that are used to save Microsoft® Office Excel® workbooks) |