DBIS (Database information system) In DBIS you can find a large number of databases that are available in the Internet free of charge. The detailed description of every source of information should help you in your search. The database information system is a cooperative service that aims to help people use scientific databases. More than 225 libraries work together, and DBIS now contains around 8,400 entries. Of these, more than 2,900 are freely available via the Internet. Which databases are listed? Databases are only listed in the DBIS if they have a Search function for finding information. The contents of every database are described. You will find the classification according to subject matter particularly helpful. If you use this view, you will also find the best databases, selected by us. DBIS is only available in German.