The result was the HP-35, the world's first handheld scientific calculator. When it was introduced in 1972, it made the slide rule obsolete. Hewlett was co-author of several technical articles in the field of electrical engineering and the holder of numerous patents. He was a member of the National Academy of Sciences and a fellow of the American Academy of Arts and Sciences. In 1966, the Hewlett family established the William and Flora Hewlett Foundation to direct the family's extensive philanthropic interests.
Funeral arrangements are pending.
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