# IBM z/OS and IBM i (i5)—COBOL and C

In EBCDIC environments, the EMS client library automatically converts message strings. To client programs, all strings appear in the host code page. On the network, all strings appear in the network host page. For details, see `tibems_SetCodePages()`

All the COBOL calls documented in this reference refer to COBOL on the z/OS and IBM i platforms.

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