Preventing piracy : a business guide to software protection / Ernest E. Keet. Keet, Ernest E. Copyright Computer programs United States. Computer programs Patents. Computer contracts United States. Software piracy. KF3024.C6 K44 1985 346.7304/82 347.306482 19 KEP Includes index. Bibliography: p. 147-153. Reading, Mass. : Addison-Wesley Pub. Co., c1985. c1985. 1985 Text viii, 156 p. : eng United States. United States.