 Computer-implemented inventions that "only" solve a business problem using a computer, rather than a technical problem, are considered unpatentable as lacking an inventive step (see T 258/03).Nevertheless, the fact that an invention is useful in business does not mean it is not patentable if it also solves a technical problem.A summary of the developments concerning patentability of computer programs under the European Patent Convention is given in (see G 3/08) as a response of the Enlarged Board of Appeal to questions filed by the President of the European Patent Office according to Art.