Audience This book is intended for anyone who wants to learn Fortran 03, including those fam- iar with programming language concepts but unfamiliar with Fortran. Experienced Fortran 95 programmers will be able to use this volume to assimilate quickly those f- tures in Fortran 03 that are not in Fortran 95 (Fortran 03 contains all of the features of Fortran 95). This guide is not a complete reference work for the entire Fortran l- guage; it covers the basic features needed to be a good Fortran programmer and an - troduction to the important new features of Fortran 03. Many older error-prone features have been omitted and some of the more esoteric features that are new to F- tran 03 also are not discussed.