The Thomson Corporation and its subsidiaries provide information services to business and professional customers primarily in the United States, Europe, Asia Pacific, and Canada. The company operates through five segments: Thomson Legal, Thomson Financial, Thomson Tax and Accounting, Thomson Scientific, and Thomson Healthcare. The Thomson Legal segment offers information, decision support tools, and services to legal, intellectual property, compliance, business, and government professionals under the brands Westlaw, Aranzadi, BAR/BRI, Carswell, Thomson CompuMark, Thomson Elite, FindLaw, LIVEDGAR, and Sweet & Maxwell. The Thomson Financial segment provides products and integration services to financial and technology professionals in the corporate, investment banking, institutional, wealth management, and fixed income sectors under the brands Thomson ONE, AutEx, Baseline, Datastream, First Call, I/B/E/S, Investext, IR Channel, SDC Platinum, StreetEvents, Thomson Transaction Services, and TradeWeb. The Thomson Tax and Accounting segment offers information, decision support tools, and software applications for tax and accounting professionals under the brands Checkpoint, Creative Solutions, and RIA. The Thomson Scientific segment provides tools to researchers, scientists, and information professionals in the academic, scientific, corporate, and government marketplaces. Its principal businesses and information solutions include Derwent World Patents Index, MicroPatent, Thomson Pharma, Web of Science, and ISI Web of Knowledge. The Thomson Healthcare segment offers information and decision support tools to physicians and other healthcare professionals in the healthcare, corporate, and government marketplaces. Its primary businesses and information solutions include Medstat, Micromedex, PDR (Physicians' Desk Reference), and Solucient. The Thomson Corporation was founded in 1977 and is based in Stamford, Connecticut.