The success of Fortran as the predominant language in the field of scientific and numerical computing is due, in part, to its steady evolution. The latest version, Fortran 95, was published in 1997 and included new features from Fortran 90 for array processing, abstract data types, modules, and pointers, as well as additional features to keep it aligned with High Performance Fortran. This book is a revision of Fortran 90/95 Explained. The Fortran 95 material is now fully integrated with the material on Fortran 90, while the text carefully maintains the distinction between the two language levels. It include new chapters on two important changes: enhanced data types and floating-point exception handling. A complete and authoritative description of Fortran 90 and 95, this book is intended for both new and experienced users.