The digital world refers to the use of digital tools and technologies to communicate over the internet and through digital devices. It has evolved from large mainframe computers used primarily by businesses in the 1960s-1970s to personal computers in the 1980s. The introduction of the World Wide Web in the 1990s opened up new possibilities for information exchange. Today, smartphones and mobile devices dominate, and everyday objects are becoming "smart" and interconnected through the Internet of Things. By 2050, there will be 9 billion people in the world, placing increasing demands on resources that the digital world may help address through connectivity, communication, and versatile working arrangements, though it also brings disadvantages like privacy and security concerns.