CADIS (Computer Aided Document Indexing System) is the system for computer aided document indexing by key words from multilingual Eurovoc thesaurus. Textual documents indexing is cogntivelly an extremely demanding task, therefore the computer automatization of procedure is more than necessary. To achieve this functionality, CADIS development integrates expert knowledge from the fields of computer linguistics and artificial intelligence, along with machine learning branch. The product is used within HIDRA, Croatian information documentation referral agency. It was first presented to public in February 2006. The applicants wish to launch the product into EU market.