A file set is a complete package of software and keys, needed to program a smart card. How the file set is composed, is dependent on the type of card it is made for. For PIC cards, a file set contains 2 files (the PIC file and the eeprom file). For AVR type cards like the Fun- and Jupiter cards, the file set contains 2 or 3 files (a flash file for the processor, an external eeprom file and sometimes an internal eeprom file).