MARGOT BIRMINGHAM PEROT

$4.2 BILLION  SELF-MADE SCORE: ! SOURCE: COMPUTER SERVICES, REAL ESTATE AGE: 85 RESIDENCE: DALLAS

PHILANTHROPY SCORE:

Her late husband, tech pioneer and presidential candidate H.

Ross Perot, died in July at 89 after battling leukemia. She met him on a blind date while he was a student at the U.S. Naval Academy.