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ProDOS ProDOS is the official Apple II DOS which came after DOS 3.3. Do not confuse “ProDOS” and “Prontodos”. Prontodos is a slightly modified DOS 3.3 which provides much faster disk I/O than standard DOS 3.3. ProDOS is a whole new disk operating system. To get ProDOS from the net, see Csa21MAIN4: Get It- Links to popular software packages.
