HAT will be an Internet-based system providing ongoing education for patients about COPD, helping patients follow their self-care plans, and helping health care providers monitor patients' self-management through daily access. The system will consist of three pieces: (1) patient units that include a computer or palmtop Internet accessible device equipped with a disease-specific testing device, (2) a HAT server to analyze and store self-testing results, and (3) clinician units that can review patient results on the Internet. By incorporating text, audio, and visual components, the system will provide advice on self-care plans tailored to each patient and will notify health care providers of each patient's plan compliance.