Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Ralf Hotchkiss is an inventor and Whirlwind wheelchair designer whose company, Whirlwind Wheelchair International, designs wheelchairs for use and manufacture in developing countries, involving wheelchair riders in all of its projects and activities. The organization's mission is "to make it possible for every person in the developing world who needs a wheelchair to obtain one that will lead to maximum personal independence and integration into society." Himself a paraplegic, Hotchkiss is a graduate of Oberlin College. Hotchkiss published the design of his appropriate technology wheelchair along with a collection of information designed to guide the start of a small business to manufacture the design. The 1985 book, "Independence through Mobility: a Guide Through the Manufacture of the ATI-Hotchkiss Wheelchair," now available in PDF form through the Center for International Rehabilitation, is an early example of open design or open source hardware.

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