The paper introduces a relational model of data for large shared data banks, emphasizing the need for data independence and addressing issues of redundancy and consistency. The relational model is based on n-ary relations and a universal data sublanguage, which allows users to interact with the data without being concerned about its internal representation. The author discusses the limitations of existing noninferential, formatted data systems, particularly in handling data dependencies such as ordering, indexing, and access path dependence. The relational model is proposed to provide a more flexible and independent approach to data management, allowing for changes in data representation without affecting application programs and terminal activities. The paper also introduces the concept of normalization to simplify data structures and improve storage efficiency. Finally, it outlines operations on relations, including permutation, projection, and join, which are crucial for deriving new relations from existing ones.The paper introduces a relational model of data for large shared data banks, emphasizing the need for data independence and addressing issues of redundancy and consistency. The relational model is based on n-ary relations and a universal data sublanguage, which allows users to interact with the data without being concerned about its internal representation. The author discusses the limitations of existing noninferential, formatted data systems, particularly in handling data dependencies such as ordering, indexing, and access path dependence. The relational model is proposed to provide a more flexible and independent approach to data management, allowing for changes in data representation without affecting application programs and terminal activities. The paper also introduces the concept of normalization to simplify data structures and improve storage efficiency. Finally, it outlines operations on relations, including permutation, projection, and join, which are crucial for deriving new relations from existing ones.