The paper analyses the digital divide and its impact on equity and discrimination in the digital age. It focuses on the lack of access to technology and how this leads to inequalities in areas such as employment, education, and public services, including telemedicine. Technology discrimination, exacerbated by biases in algorithms, disproportionately affects women, people of colour, and people with disabilities. Government intervention is crucial, as funding for internet infrastructure, educational programmes, and regulations to prevent discrimination and promote accessibility is needed. Socioeconomic and cultural factors also play a significant role, as people living in poverty have less access to technology. Van Dijk’s theory of resources and appropriation indicates that social inequalities lead to an unequal distribution of technological resources, perpetuating unequal participation in society. The paper also addresses specific inequalities in the use of IA and algorithms* working on digital platforms, cybersecurity and big data collection, which can exacerbate existing disparities. The digital gender divide stands out as a particular problem, with women having less access to technology and under-representation in its development. In addition, the COVID-19 pandemic has exacerbated digital inequalities in education, especially impacting low-income and rural students in Brazil. This Introduction to the book emphasises the importance of addressing the digital divide not only as an infrastructure problem, but also as a social justice issue, requiring a multidimensional approach that includes education, regulation and awareness of the biases inherent in technology and its applications.