UNITED STATES - SEPTEMBER 21: FILE: H. Ross Perot, co-founder and chairman emeritus of Perot Systems Corp., stands for a photo in his office in this file photo taken on Sept. 28, 2008. Dell Inc. agreed to buy Perot Systems Corp. for $3.9 billion, undertaking its biggest purchase to compete with International Business Machines Corp. and Hewlett-Packard Co. in computer services. (Photo by Ed Lallo/Bloomberg via Getty Images)

UNITED STATES - SEPTEMBER 21:  FILE: H. Ross Perot, co-founder and chairman emeritus of Perot Systems Corp., stands for a photo in his office in this file photo taken on Sept. 28, 2008. Dell Inc. agreed to buy Perot Systems Corp. for $3.9 billion, undertaking its biggest purchase to compete with International Business Machines Corp. and Hewlett-Packard Co. in computer services.  (Photo by Ed Lallo/Bloomberg via Getty Images)