nTop is a computational design software platform that enables engineers to create, analyze, and optimize complex geometry using implicit modeling and field-driven design methodologies. Unlike traditional boundary representation (B-rep) CAD systems, nTop uses implicit modeling technology to represent geometry through mathematical functions, allowing for unbreakable parametric models that remain stable across large geometric changes and enabling direct integration with simulation workflows. With engineering development cycles compressing from years to months, nTop was built to enable robust geometric operations, real-time design iteration, and rapid tradespace evaluation. nTop serves mechanical engineers, design engineers, and analysts working on complex systems where traditional CAD tools become fragile or time-consuming. Primary use cases include conceptual aircraft design, advanced turbomachinery design, thermal system optimization, and the design of additively manufactured components. Key capabilities include: - Implicit modeling technology that creates unbreakable parametric models using mathematical field representations instead of traditional boundary representations - Block-based design methodology that captures engineering logic and design intent through algorithmic workflows, enabling engineers to define parametric relationships and design rules rather than manually sketching geometry - Field-driven design that enables spatial variation of design parameters using mathematical functions and simulation data - Integrated analysis capabilities including structural FEA, thermal simulation, and computational fluid dynamics without requiring separate meshing steps - Advanced lattice and topology optimization tools for lightweighting and thermal performance optimization - Real-time visualization with GPU acceleration that shows geometric changes instantly as parameters are modified The platform eliminates common CAD failure modes where parameter changes break model topology, enabling automated design optimization workflows that can evaluate thousands of design variations without human intervention. File sizes remain small compared to traditional CAD models, with complex geometries often requiring only kilobytes of storage due to the mathematical representation approach.