The first and only compiler to implement the object oriented features of the new Fortran 2003 Standard, Release 5 of NAGWare f95 Compiler, is being introduced by the worldwide Numerical Algorithms Group (www.nag.com, SC 2003 Booth # 2900), the world’s leading provider of mathematical and statistical components. Among the F2003 features included in Release 5 of the NAGWare f95 Compiler are support for: type extensions (both polymorphic variables and type selection), rank-remapping pointer assignment, and the VOLATILE attribute. In addition, NAGWare f95 Compiler Release 5 has enhanced checking for dangling pointers, undefined variables detection, and illegal recursions. Release 5 of NAGWare f95 Compiler is available for Unix, Linux, and OS X platforms. The Unix and Linux versions will be the first NAG compilers to provide a debugger with a Graphical User Interface. The OS X version leverages some of the libraries in Apple’s veclib in order to improve performance. All versions of Release 5 of NAGWare f95 Compiler include performance improvements in the run-time efficiency of various intrinsic functions. Like earlier releases, Release 5 of the NAGWare f95 Compiler supports the Fortran 95 language in its entirety, High Performance Fortran, legacy Fortran 77 code, Fortran 2003 standards for allocatable components, and for IEEE Floating Point Exception Handling.