This teaching case presents a systems development project useful for courses in object-oriented analysis and design. The case has a strong focus on the business, methodology, modeling and implementation aspects of systems development. The case is centered on a fictitious ambulance and emergency services company (Rescue911). The case describes that the company's current systems no longer meet their business requirements and outlines the need for a new systems solution. The new situation is presented in form of business requirements, a conceptual system breakdown and interviews with the stakeholders. The teaching notes present business process and object-oriented analysis diagrams to complement the case. Students are confronted with realistic and different categories of business artifacts as input for their systems development project. Suggested project deliverables are outlined. (Contains 2 figures and 1 table.)