What is portability? -- Some side effects of striving for portability -- Machine characteristics and portability -- Machine requirements for reliable, portable software -- Semantics of floating point arithmetic and elementary functions -- Machine parameters for numerical analysis -- Preparing conventions for parameters for transportable numerical software -- Programming languages and portability -- Algol 68 as a language for numerical software -- Writing the elementary function procedures for the ALGOL68C compiler -- Criteria for transportable algol libraries -- Fortran portability via models and tools -- Port — A portable mathematical subroutine library -- Fortran poisoning and antidotes -- Two numerical analysts' views on the draft proposed ans fortran -- Intermediate languages: Current status -- Computer-assisted portability -- Mathematical software transportability systems have the variations a theme? -- Features for fortran portability -- The IMSL fortran converter: An approach to solving portability problems -- Aids to portability within the NAG project -- Multiple program realizations using the tampr system -- Software design to facilitate portability -- The production and testing of special function software in the NAG library -- Portable special function routines -- The importance of standardized interfaces for portable statistical software -- Exploring the impact of portability -- On the enhancement of portability within the NAG project — A statistical survey -- A study of portability in technical and scientific computing.