Language Processors
In analyzing the compilation of PL/I program, the term "Machine independent optimization" is associated with

use of macro processor to produce more optimal assembly code
creation of more optional matrix
recognition of basic elements and creation of uniform symbols
recognition of basic syntactic constructs through reductions

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Language Processors
Bug means

A logical error in a program
Documenting programs using an efficient documentation tool
A difficult syntax error in a program
All of these

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