Table 1 shows a sample list of OS/VS COBOL compatibility subroutines to preload if you use the OS/VS COBOL RES compiler option. If you run OS/VS COBOL programs with Language Environment, you might also want to preload the modules listed in the Performance Paper.
| ILBOCHN0 | ILBOCMM0 | ILBOCOM0 |
| ILBOCVB0 | ILBODTE0 | ILBOETB0 |
| ILBOGDO0 | ILBOINS0 | ILBOITB0 |
| ILBONTR0 | ILBOSCH0 | ILBOUST0 |
| ILBOWTB0 | ILBOSRV0 | ILBOSTG0 |
| ILBOSTT2 | ILBOTRN0 |