This text teaches how to write computer programs in the Classical dialect of the FORTRAN language. Along with numerous updates and revisions throughout, this second edition includes an additional case study on file I/O, new sections that cover CPU timing on Pentium processors, and more information about the g77 compiler and Linux. It continues to use case studies and examples to introduce the language elements and design skills needed to write graceful, correct, and efficient programs for real engineering and scientific applications. A solutions manual is available for qualifying instructors.