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This paper describes one method for identifying global variables in Ada procedures and adding them to the parameter list of appropriate procedures. Global variables, ones that are visible to the entire program, are considered harmful to the maintainability of software systems because of the side effects that can result. A tool has been developed based on the Ada Semantic Interface Specification (ASIS) that can be used to identify global variables and re-engineer Ada procedures. By adding globaldoi:10.1145/1046191.1032303 fatcat:dtfuecbwabev7b6ms73qllo774