Cornerstone Software Development Inc (CSDI) is a software development and systems engineering company located in Morgantown, Pennsylvania. CSDI has been delivering reliable software systems and components since 1989 to clients nationwide. Our solutions collect data from thousands of mobile devices, presenting it in easy to understand web interfaces that provide immediate and lasting value to our clients. CSDI works with its clients in every phase of software and systems development from system design, design review, scheduling, implementation, documentation generation, testing, delivery, training and maintenance.