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Package Number: 1021

Last Update: 2/76

Submitted By: University of Maryland


PLUM is a compiler, develops at the University of Maryland, for the PL/1 language. PL/1 is a powerful programming language that combines the computational power of a language like FORTRAN with the file processing capabilities of a language like COBOL. In addition, the full range of string and arithmetic operators and functions, as well as the concise logical program structure, make it a very convenient language in which to program.

PLUM has the following characteristics:

  • It is extremely efficient. Over 100 statements per second can be compiled on a 1108.

  • PLUM produces absolute machine code, this no collection step is necessary. This increases, even further, the efficiency of the compiler compared to a standard compiler which produces relocatable output.

  • Many diagnostic aids are built into the PLUM system, thus making PLUM an integrated program developement and evaluation system, as well as simply a very fast compiler. Programs may be debugged by accessing program variables by name, rather than by octal location. There is never any need to resort to machine language debugging techniques.



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