Information architecture (IA) is a cohesive blueprint used to express detailed functionalities and information within structures and systems. IA originated as a content management methodology in the technical writing field. Activities including library systems, content management systems, Web development, user interactions, database development, programming, technical writing, enterprise architecture, and critical system software design.

Information architecture is defined by a structural design of shared environments, methods for organizing and labeling websites, intranets and online communities, and ways of bringing the principles of design and architecture to the digital landscape. IA is implemented by a variety of industry genres and organizations, including technical writing and Web design.