(Bloomberg) -- Gene Amdahl, who helped IBM usher in general-purpose computers in the 1960s and challenged the company’s dominance a decade later with his eponymous machines, has died. He was 92.

He died on Nov. 10 at Vi at Palo Alto, a continuing care retirement community in Palo Alto, California, his wife Marian Amdahl said in a telephone interview. The cause was pneumonia, and he had Alzheimer’s disease for about five years.

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