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A very well rounded text. Now that modern Linux systems have achieved the high standards of quality attained by the minicomputer generation that preceded the personal computer, the real question to ask is when will the Windows operating system achieve the quality of these 1970's systems, most particularly in terms of security keeping out the viruses that trash disk drives! "An attempt has been made to keep the book as machine independent as possible;" In fact, many of the examples are illustrated by way of discussing the IBM 360/370 machines!