A top domain constitutes the last letters of an Internet address, e.g. “.no” and “.com”. The top domain is therefore the ending of all web addresses and email addresses. In some countries, for instance in England, a separate domain under the top domain to be reserved for businesses was established, namely the domain “.co”. As a result one sees that web addresses and email addresses in England very often end in “.co.uk”. If one, for example, should visit the BBC’s homepage, one needs to go to the web address www.bbc.co.uk. This is also true in some other countries which have established such “.co” domains, which have either been reserved for businesses or have been open to all.