Apple co-founder Steve Wozniak is going back to work as chief scientist at Fusion-io, a start-up company that tweaks computers to let them tap vast amounts of storage at very quick rates. In the early days of Apple, Wozniak stood out as one of Silicon Valley’s most creative engineers demonstrating a knack for elegant computer designs that made efficient use of components and combined many features into a cohesive package and Wozniak will do similar work at Fusion-io, although this time with larger server computers and storage systems rather than PCs. «I have a pretty quiet life, and I like to watch technology evolve,» says Wozniak. «In this case, I like the people and the product, and said I would like some greater involvement.»