Decoding Jeff Jonas, Wizard of Big Data

Jonas solves problems the high-tech way—mining the "data warehouse in his head."

Jeff Jonas was 14 years old when he saw his first computer. It would not be an overstatement to label the experience profound, and completely accurate to call it a revelation. The scriptural resonance of the word "revelation" is not inappropriate; the discovery would launch Jonas on a Pilgrim's Progress through the landscape of digital information and personal growth.

The journey began in his hometown of Healdsburg, California, on the day his mother, a lawyer, said, "I am going to look at a computer to help me with time and billing." It was 1979, and the TRS-80 they went to check out at the RadioShack store was the first mass-produced, preassembled PC. It had a giant floppy disk drive and was

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