The advent of inexpensive, reliable disk drives for home use represents a revolution in what can be achieved with a microcomputer. Any computer, no matter how large or small, comes into its own only when it is able to access data far more quickly than can be achieved with the trusty but tortoise-like cassette drive. Without fast mass storage, substantial programs become tiresome burdens which can take up to 15 minutes to load. The handling of data becomes a nightmare, with its constant necessity to rewind or change tapes and the wait while data is slowly added to memory. In short, the best computer is only as good as the means it uses to store data. The disk drive is far from a luxury, it is an essential component of an effective microcomputer system. Nowhere is this more true than in relation to the Commodore 64. The success of the 64 as far more than a games machine or a computing toy is based to a large extent on Commodore's ability to produce a disk drive which works to the highest standards and yet is within the price range of anyone who takes their computing at all seriously. But simply to buy a disk drive is not the solution to the problem of enlarging the scope of the 64. Like any disk drive, the 1541 has its own way of working, and its own habits which are neglected at its owner's peril. Poorly thought out working methods with a disk often mean that much of its potential can remain unrealised. Carelessness, or lack of understanding, can mean that valuable data or programs are irretrievably lost. And yet, for all that, the 1541 is a well designed piece of equipment, full of features that many disk drive owners can only dream about. This book is an attempt on our part to share some of the many discoveries that we have made about the 1541 disk drive, the enjoyment that comes with using it and the power that is released when it is used well.