Originally Posted by *******_
Itsn neither both
Ista is Software that allow you to diagnose and update modules ( like previous it was DIS and Progman ) , ISTA files can be use to update NCS, and Ediabas plus with files taken from ISTA you can update modules via WINKFP ( Daten )
I should study it then, if it is that important. Can you put me into right direction or google should be good enough?