Steve Wozniak signed copy of the Apple II DOS Programmer's Manual, published in 1982. The Apple founder signs the front cover in blue ballpoint, ''Think Different! / Woz''. Spiral bound book measures 7.875'' x 9''. Minor creasing and soiling, mostly confined to covers, else near fine. Manual is complete, including the perforated Quick Reference Card in back. With PSA/DNA COA.