Abstract: An electronic, computer based telecommunication system has an object oriented processor system with the aid of which data are exchanged between data bases and customers connected thereto. A data record is created from a selected memory in which all the information from for example a telephone call is stored, this record being common to all customers. The record comprises only that information which is required by the customers. From this data record then the specific data which are desired by an individual customer are extracted. Three kinds of objects are defined and stored in corresponding memories, service templates, customer templates and an output type. The first objects define the types of service which is used. In a second object the information is defined which a customer wants to extract from the common data record. Thus each customer has its own customer template.