The syntax listed here is accepted by your COBOL system purely for compatibility with version 1.3 of Data General Interactive COBOL. Many features found in Data General Interactive COBOL exist already in this COBOL implementation. These are documented in your COBOL Language Reference. Some of the compatibility syntax listed in this chapter is identical to standard COBOL syntax, but behaves differently if you set the DG Compiler directive when you submit your source code to your COBOL system. See the Data General Interactive Programmer's Reference Manual for a full description of the Data General syntax.