This paper describes a new, open architecture data acquisition and calibration system, called CALVIN, developed for use in the automotive environment. The design is standards based and allows for growth with future technological breakthroughs. A major driver for the design has been the need to use commercial tools and capabilities. CALVIN, based on Windows95/NT/98 and with the careful partitioning of the hardware and software, has allowed the system to achieve the goals of de-coupling the vehicle calibration development process from the tool while allowing for the protection of user-specific intellectual property. The distributed nature of the design optimizes both the utilization cost and performance and thus, allows for an easy growth path as the environment and needs change. Automation of data acquistion and calibration is available through applications that are compatible with OLE/COM such as Visual Basic and C++.The business need to leverage third-party analysis, presentation and visualization software has driven the system design and some examples are provided.The paper discusses the software and the hardware architecture, the system functions, the capabilities of the system and some potential growth-paths and extensions. Reliability, durability and cost targets of the system have been met and will be discussed. The paper will also describe the CALVIN tool development process and the business case behind the decisions.Conclusions to be drawn from this design are that an open architecture, distributed data acquisition and calibration system is feasible for use in automotive environment and has significant cost, efficiency and growth implications.