FRESNO — Robert Bernardo spent a week this spring traveling the Pacific Northwest, trying to save part of yesterday's future. The high school English teacher swung through Portland and Astoria, Ore., and then on to Ethel, Wash., to drop off a collection of antiquated computers — a PET8032, three VIC-20s, an SX-64 portable and a Commodore 128D. Then on his way home to the Central Valley town of Visalia, Bernardo packed his white Crown Victoria with three more SX-64s, boxes of software and a couple of printers. With any luck, this agglomeration of decades-old circuit boards and dusty disk drives...