Internal structure consists of a wide range of patents, concepts, models, and computer and administrative systems. These are created by the employees and are thus generally "owned" by the organisation, and adhere to it. Sometimes they can be acquired from elsewhere. Decisions to develop or invest in such assets can be made with some degree of confidence, because the work is done in-house, or bought from outside. Also the informal organisation, the internal networks, the "culture" or the "spirit" belongs to the internal structure. The internal structure and the people together constitute what we generally call the "organisation".