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ZOPL (Zero-One Programming Language) is a domain-specific language for specifying and solving optimization problems. It lets you model complex decision-making scenarios involving constraints, preferences, and objectives using mathematical expressions. ZOPL provides an approachable syntax and built-in routines for solving combinatorial optimization problems, such as those found in scheduling, logistics, network design, and resource allocation. The language usually targets experts in operations research or algorithm development who work on large-scale systems where optimizing the use of resources can yield significant financial savings or operational efficiencies.