MySQL is a waiter of relational data bases SQL developed to ensure high performance.

It is multi-thread, robust and multi-user.

It is a free software developed under double licence according to the use which is made by it: in a free product (open-source) or in a product owner.

It makes it possible to create and use, in a simple way, the data bases.

Some characteristics: the cards have to 16 different, tri fields cards, each base can be encrypted, possible total research on all the contents of the data base.