In most companies the landscape of used computer software is very heterogeneous; this causes a need for data integration. This is especially difficult to achieve for small and mid-sized enterprises, as they face the problem of relatively high costs for the existing standard solutions spread only on a small scale. Open standards can be a solution for that. In this context, terms such as RDF, OWL and SPARQL tend to be heavily stressed whenever knowledge integration and data management S addressed; only very few works on the use of Topic Maps have been published. In this paper it will be explored on an example of Customer Relationship Management how the basis for an effective and efficient Customer Relationship Management can be provided by the technology of Topic Maps and how the technology works.