AHT Corporation (formerly known as Advanced Health Corporation) provides Internet-based clinical e-commerce applications for physicians, other health care providers and healthcare organizations. Products take an incremental approach to practice automation and operate within a client/server-based open architecture. The company's clinical information systems consist of proprietary software, third-party hardware, proprietary third-party databases, and related support services. The company licenses its clinical information systems to third party healthcare organizations, principally laboratories and prescription benefit management companies. Advanced Health manages four multi-speciality physician group practices and four single-speciality physician group practices in New York. The company became publicly held in October 1996.