Changes in the technological part of the societal environment can also have a great impact on multiple industries. Improvements in computer microprocessors have not only led to the widespread use of personal computers but also to better automobile engine performance in terms of power and fuel economy through the use of microprocessors to monitor fuel injection. Digital technology allows movies and music to be available instantly over the Internet or through cable service, but it also means falling fortunes for video rental shops such as the Movie Gallery and CD stores such as Tower Records. Advances in nanotechnology are enabling companies to manufacture extremely small devices that are very energy efficient. Developing biotechnology, including gene manipulation techniques, is already providing new approaches to dealing with disease and agriculture. Researchers at George Washington University have identified a number of technological breakthroughs that are already having a significant impact on many industries: