Cassette.
In 'The Future Just Happened' Michael Lewis argues that not only does our generation now have the easiest access to more information than ever before, but that new technology is a Trojan Horse for important social changes that are far more interesting than technology itself.
For example, since the rise of Silicon Valley, management structures have been turned upside down, creating a situation where those who can navigate towards success in the twenty-first century are no longer the high-ranking directors but the technologically-trained youth.