D. R. Fulkerson, or Delbert Fulkerson, is a prominent figure in the field of operations research and combinatorial optimization. He is best known for his contributions to network flows and integer programming, which are essential areas in mathematics and computer science. His work has significantly influenced the development of algorithms used in various applications, including logistics and transportation. Fulkerson's research has led to the formulation of several important theorems and concepts, such as the Max-Flow Min-Cut Theorem. He has published numerous papers and collaborated with other mathematicians, further advancing the understanding of optimization problems. His legacy continues to impact both theoretical and practical aspects of operations research.