McKesson Corp. engages in providing healthcare services. It operates through the following segments: U.S. Pharmaceutical, Prescription Technology Solutions (RxTS), Medical-Surgical Solutions, and International. The U.S. Pharmaceutical segment distributes branded, generic, specialty, biosimilar and over-the-counter pharmaceutical drugs. The RxTS segment offers prescription price transparency, benefit insight, dispensing support services, third-party logistics, and wholesale distribution. The Medical-Surgical Solutions segment provides medical-surgical supply distribution, logistics, and other services to healthcare providers. The International segment refers to the distribution and services to wholesale, institutional, and retail customers in Europe and Canada. The company was founded by John McKesson and Charles Olcott in 1833 and is headquartered in Irving, TX.