FORTRAN language operators

This big increase in speed has not been without cost. The everyday machine codes and high-level languages (Fortran, Pascal, C, etc.) used to control operations in a standard computer are inappropriate for parallel processing, which needs its own instruction set and has led to the development of special languages for use with the transputer. 

PASCAL was developed as a scientific language. It was followed by C and its successor C++, which have practical shortcuts for matrix operations that FORTRAN treats so clumsily C++ is a favorite for computer science courses. It has now morphed into Python. 

This would certainly have resulted in an operational library in the shortest possible time but at considerable sacrifice in efficiency. All of the VPLIB subroutines were therefore written entirely in Z80A/MVP-9500 assembly language and this produced modules which contained, on average, one third of the assembler instructions produced by F80 for the same operation coded in FORTRAN. In addition to these straightforward savings a considerable amount of hand optimization was possible on the assembler level subroutines. 

CLIPS program code can be embedded within procedural code written in C, Java, Fortran, and ADA and provides a series of protocols for integration with software written in other programming languages. Although CLIPS is written in C, it can be installed on different operating systems, like Windows 95/98/NT/2000/XP, MacOS X, and UNIX, without code changes. It can be ported to systems with ANSI-compliant C or C-H- compilers. 

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