| Linux: | download CTY.DAT to the directory ~/.fldigi |
| Mac OS X: | download CTY.DAT to the download folder. Open Fldigi and click on File/Show Config – then drag and drop CTY.DAT into the open .fldigi folder |
| Windows XP: | download CTY.DAT to the folder C:\Documents and Settings\<username>\fldigi.files |
| Windows Vista: | download CTY.DAT to the folder C:\Users\<username>\fldigi.files |
fldigi – Digital modem program for Linux, Free-BSD, OS X, Windows XP, NT, W2K, Vista and Win7