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The strategic VSE COBOL compiler is COBOL for VSE/ESA with Full-Function Feature that includes the Debug Tool for VSE/ESA. The run-time library is Language Environment for VSE/ESA Version 1 Release 4. With these products customers can move their COBOL applications into and beyond Year 2000. The benefits of moving to the new environment are described in this document. The detailed description of the differences between the various language levels and of available migration aids will help you perform the upgrade. This redbook has been written for all professionals with the responsibility for planning and executing the migration of DOS/VS COBOL or VS COBOL II applications to COBOL/VSE and the run-time environment of LE/VSE. Good knowledge of VSE/ESA concepts and HLL programming is required.

The IBM Language Environment for VSE/ESA (LE/VSE) now also offers for VSE customers the concept of a common run-time library for programs written in high level languages. All applications written in C, PL/I and COBOL can use a generalized set of services during program execution, thus avoiding cross-language inconsistencies. Together with LE/VSE, IBM provides a set of new compilers, COBOL/VSE, PL/I VSE and C/VSE. Apart from of enabling the usage of the newest advanced system functions, they also offer the exploitation of the "Year 2000" date format which is a prerequisite for the migration of date-dependent programs; the most appropriate techniques for this simple migration are described and illustrated by examples. This redbook has been written for all professionals concerned with the upkeep of their application program libraries, especially in anticipation of the changes required for Year 2000. Good knowledge of VSE/ESA concepts and HLL programming is assumed.