A UCLA Professor and Net Pioneer Paves the Way for the Next Big Thing

Leonard Kleinrock is getting ready for the era of ubiquitous computing

"Oh, you want to get to D? Well, next you go to C -- hop, hop, hop." The man making the sound effects is Leonard Kleinrock, whose pen is busy rapidly drawing loops and lines on a scrap of paper. He is explaining how packets of data are routed inside a computer network.

Well into the second of his two careers devoted to Internet research, Mr. Kleinrock, who is 65, can't stop teaching -- or inventing. Although

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