Formerly known as Per-Se Technologies, McKesson Corporation is a publicly traded health care services and information technology company that provides pharmaceuticals, medical supplies and health care information technologies. In operation for more than 175 years, the company delivers oncology and specialty services and solutions. It provides decision support software that determines clinical diagnosis and treatment plans for patients. Additionally, McKesson develops and installs electronic systems that eliminate the need for paper prescriptions and paper medical records. The company employs over 32,000 people throughout the world. It serves hospitals, physicians, and hospital retail pharmacy automation and manufacturers, including nearly 30 pharmaceutical distribution centers and approximately 30 medical-surgical distribution centers. McKesson Corporation operates a full-service specialty pharmacy in Pittsburgh and Pennsylvania. Its clients include Walmart and the Department of Veterans Affairs.