The book investigates the practical applications and real-world implementations of mathematical programming techniques. It draws upon the expertise of M. L. Balinski, a noted figure in the field, to explore how optimization methods are utilized across various domains. The text likely examines case studies and theoretical frameworks that bridge the gap between abstract mathematical models and their tangible outcomes in industry and research.

This collection of works, edited by M. L. Balinski, is likely regarded as a significant contribution to the field of applied mathematics and operations research. The focus on 'in use' suggests a practical orientation, appealing to researchers and practitioners seeking to understand how mathematical programming solves real-world problems. The book's value would stem from its curated selection of applications and the insights provided by its contributors into the efficacy and challenges of implementing optimization techniques.