Towards the end of the 20th century, mobile phone ownership became ubiquitous in the industrialised world - due to the establishment of industry standards, and the rapid fall in cost of handset ownership, and use driven by economies of scale. As a result of this explosion, technological advancement by handset manufacturers became rapid. With these technological advances, mobile phone games also became increasingly sophisticated, taking advantage of exponential improvements in display, processing, storage, interfaces, network bandwidth and operating system functionality. The first such game that demonstrated the desire for handset games was a version of "Snake" that Nokia had included on its devices since 1997.