Hi guys, I was wondering:

1. how applications like MYOB Accountings, and Quickbooks store the datas ? Do they even use database engine ? I mean, they make and generate their own file extensions. How to create such a database that doesn't need or doesn't depend on database engine, and could store large amount of data ?

2. Do applications like MYOB and Quickbooks store their datas in .txt format, then when the user wants to open the file, the program "IMPORT" the data automatically to the database engine which the user has ?

Sorry, if my questions are noobs! Well, I'm a noobie, what can I say ? Answers will be very appreciated, thanks a lot !

Chris