DDD

DDD is an acronym used to refer to several concepts across different fields. Because it has multiple distinct meanings, the exact interpretation depends on the context.

Domain-Driven Design (DDD) is a software engineering approach introduced by Eric Evans. It emphasizes modeling software around the core domain and its logic, with close collaboration between domain experts and developers. Central ideas include bounded contexts, where a model is defined within clear boundaries; a ubiquitous language shared by both technical and non-technical stakeholders; and design patterns such as entities, value objects, aggregates, repositories, and domain services. DDD aims to manage complexity in large systems by aligning the software structure with business concepts and rules. Proponents argue that it improves maintainability, clarity of responsibilities, and alignment with business goals, while critics note that it can require substantial upfront investment and may not be suitable for all projects.

Direct Distance Dialing (DDD) is a term from telecommunications describing the ability to place long-distance calls directly without operator assistance. As telephone networks expanded and routing schemes evolved, dialing long-distance numbers became automated, reducing reliance on manual operators. The concept remains foundational in modern dialing practices, even as technology and numbering plans have grown more complex with mobile and international calling.

Other uses of DDD exist in various organizations, standards, or products, and the intended meaning is typically determined by contextual cues. When encountering the acronym, consult the relevant field or source to identify the precise sense of DDD.