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allows alphanumeric arithmetic binary Boolean Algebra bytes called program chapter characters Cobol language Cobol program collating sequence conditional statement contain control footing Data Division data name debugging decimal places decimal point declarative defined delimiter digits discussed DISPLAY EBCDIC elementary items encoding END clause entry ERROR executed EXHIBIT NAMED floating point flow of control GR-AMT group item IBM OS/VS Cobol illustrates Input Procedure Job Control Language KEY clause language manual level numbers Linkage literals logical memory Merge module multiple non-numeric numeric data item occurrence numbers OCCURS clause operands operations option organization Output Procedure parenthetical perform range picture printed priority number Procedure Division procedure names PROGRAM-ID receiving field record description reference referenced RELATIVE KEY relative record result Return statement SECTION segments sending field sequential Sequential Access Sort statement sort-file specified string Structured Programming subprogram subroutine SUBTRACT truncation VSAM word WRITE written XX-TEXT zero