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'''Das Schneider CPC Systembuch''' by [[Günter Woigk]] was one of the most comprehensive and demanded sought-after technical reference references of the Amstrad CPC in GermanyGerman language, often called the CPC-"CPC bible" for programmers". The book describes as well In addition to explaining the different hardware components operating system functions and how to access call and program use them, as the operating system functions book describes the different hardware components and how to call access and use program them.