Qedward writes "The Norwegian Ministry of Finance seems to be taking a bit of stick at the moment. It wants all the existing cash registers in the country thrown out and replaced with new ones. Not surprisingly, this massive upgrade is not popular. But it is apparently being pushed through in an attempt to prevent cash registers' figures being massaged downwards in use so as to reduce tax. The Norwegian association of tax auditors said: 'The source code must be opened.' 'Without source code it is not possible to determine whether or "hidden" functionality exists or not. Just knowing that the tax authorities have access to the source code of the application, will reduce the effort to implement hidden functionality in the software.'"