He was 89.

The pioneer of the computer services industry, who founded Electronic Data Systems Corp. in 1962 and Perot Systems Corp. 26 years later, was just 5-foot-6, but his presence filled a room.

“Describe my father?” Ross Perot Jr., his only son and CEO of the Perot Group, asked rhetorically in an interview. “Obviously a great family man, wonderful father. But at the end of the day, he was a wonderful humanitarian.

“Every day he came to work trying to figure out how he could help somebody.”

Perot was diagnosed with leukemia in February. A massive secondary infection the next month nearly killed him, according to the family.