Information architecture is the practice of expressing an information model, or concept for information. Information Architecture is utilized in web development, user interactions, database development, programming, technical writing, enterprise architecture, and other activities that require expressions of complex systems. Information architecture has somewhat different meanings in these different branches of what might be called IS and/or IT architecture.

Information Architecture (often abbreviated "IA") is defined by the Information Architecture Institute as

1. The structural design of shared information environments.
2. The art and science of organizing and labeling web sites, intranets, online communities and software to support usability and findability.
3. An emerging community of practice focused on bringing principles of design and architecture to the digital landscape.