Andújar is one of the principal exponents of Net.art founder of Technologies To The People and a member of irational.org. The most prominent projects in this sphere would be the 'Street Access Machine' (1996), a machine allowing those begging in the street to access digital money; The Body Research Machine (1997), an interactive machine that scanned the body's DNA strands, processing them for scientific experiments, and x-devian by knoppic, an open-source operating system presented as part of the Individual Citizen Republic Project: The System (2003) project. Another course the work takes would be the critical reflection on the art world TTTP presents through the Technologies to the People Foundation with its collections distributed free of charge—Photo Collection (1997), Video Collection (1998) and Net Art Classics Collection (1999)—already calling the idea of material and intellectual property into question during this period. Andújar is the director of numerous internet projects, such as e-sevilla, e-valencia, e-madrid and e-barcelona.
From January to April 2015, the Museos Nacional Centro de Arte Reina Sofía (MNCARS) hosted a comprehensive solo exhibition of his Works curated by Manuel Borja-Villel under the title Operating System. His Work is in major public and private collections, including the Museo Nacional Centro de Arte Reina Sofia's National Collection.