These materials are shareware; they are not free. The cost is one Canadian dollar or $0.75 US) per student per chapter used to a maximum of 15 chapters ($15CDN or $10US). This introductory material (including preface and table of contents) is, of course, free. The Appendix is one chapter but is also free. The answers to the questions and selected problems are provided free, but without any guarantees. Any other chapters used once 15 have been paid for are free. Any programs used from the book (including the answer key), whether to write software or as part of an assignment must be acknowledged.
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