"The Symbian software was allowed a patent by the Court of Appeal because it improved the operation of the software in a mobile phone, which the court said meant that it had a technical effect. The new IPO guidance outlines the change in the IPO's approach in the aftermath of the Symbian decision. "The Intellectual Property Office has previously recognised that an invention which either solves a technical problem external to the computer or solves "a technical problem within the computer" is not excluded," it said. "What Symbian has now shown is that improving the operation of a computer by solving a problem arising from the way the computer was programmed – for example, a tendency to crash due to conflicting library program calls – can also be regarded as solving "a technical problem within the computer" if it leads to a more reliable computer." "Thus, a program that results in a computer running faster or more reliably may be considered to provide a technical contribution even if the invention solely addresses a problem in the programming," it said."