This book is a complete presentation of standard FORTRAN 77 with special applications of numerical methods in science and engineering. It surpasses the coverage of its best-selling predecessor, FORTRAN 77 for Engineers and Scientists, Third Edition, by adding a current introduction to Fortran 90. This book emphasizes sound structured programming and software engineering principles; its clear and concise presentation is perfect for readers who possess a background in algebra, with no previous programming experience.