 Perot Systems was especially strong in health care industries with services such as digitizing and automating medical records.A Fortune 1000 corporation with offices in more than 25 countries, Perot Systems employed more than 23,000 people and had an annual revenue of $2.8 billion prior to its acquisition for $3.9 billion in 2009 by Dell, Inc. as Dell Services.Dell Services was then acquired by NTT Data in November 2016.