Concept-oriented design (COD) is a theory of design and development based upon the language and diagrams of practitioners. It has been implemented in a tool Chasm to build 3D user interfaces (3DUIs). Its name is borrowed from the generic programming idea of a software concept. It was created by Chadwick Wingrave under the direction of Doug A. Bowman while at Virginia Tech and detailed in his dissertation, an early peer-reviewed workshop paper  and a peer-reviewed paper  at a conference on virtual reality sponsored by the Institute of Electrical and Electronics Engineers.
Concept-oriented design should not be confused with any other concept-oriented theory such as concept-oriented programming or concept-oriented model, work of Alexandr Savinov. Their only relationship is a similar-sounding name.
- The Wiki Page for COD in Chasm – defunct after PhP upgrade
- Wingrave, C. A. 2008. Concept-Oriented Design in Chasm: Conversational Domain Language Inspired 3D User Interface Design and Development. PhD Dissertation, Virginia Tech. ETD Dissertation
- Wingrave, C. & D. Bowman, 2005. CHASM: Bridging Description and Implementation of 3D Interfaces. New Directions in 3D User Interfaces Workshop, In IEEE Virtual Reality
- Wingrave, C. & Bowman, D., 2008. Tiered Developer-Centric Representations for 3D Interfaces: Concept-Oriented Design in Chasm. IEEE Virtual Reality.