Paper presents the concept ‘boundary object’. This paper is cited in most of the papers that are related to boundary objects. Boundary objects are ‘objects which are both plastic enough to adapt local needs and the constraints of the several parties employing them, yet robust enough to maintain a common identity across sites’ or in other words ‘adaptable to different viewpoints and robust enough to maintain identity across them’. The research was done in a Museum of Vertebrate Zoology and it studied communication between professionals in different positions. Four types of boundary objects are identified in that setting: repositories, ideal types, coincident boundaries and standardized forms.