Information systems have played an important role in organizations, especially in the business field. Organizational semiotics is one of the social technical approaches that considers information through the signs, norms or activities performed within an organization. This paper proposes a conceptual design of the boundary between information systems and organizational semiotics. To perform this task, a Point of Sale (POS) information system for a restaurant was developed as a case study in Apurimac Peru. The system allows the waiter to customize the food and drink orders. To validate this proposal three type of techniques were performed: document review, observation and interview. Also participated in the proof of concept the following people: waiter, customer, owner, cashier and cook. The collected results highlight the three layers and the morphology in the restaurant information system linked to organizational semiotics.