Edmund F. Codd invented the relational model for database management while working at IBM in 1970, which became the foundation for all RDBMS systems. His groundbreaking paper 'A Relational Model of Data for Large Shared Data Banks' revolutionized database technology. The distractors are incorrect - Layman worked on XML, Berners-Lee invented the World Wide Web, and Parino is not a known figure in database history.