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Doug Engelbart, a visionary who invented the computer mouse and developed other technology that has transformed the way people work, play and communicate, died late Tuesday. He was 88. His death of acute kidney failure occurred at his home in Atherton, Calif., after a long battle with Alzheimer’s disease, according to one of his daughters, Diana Engelbart Mangan. Back in the 1950s and `60s, when mainframes took up entire rooms and were fed data on punch cards, Engelbart already was envisioning a day when computers would empower people to share ideas and solve problems in ways that seemed unfathomable at the time.