MPE/iX Shell and Utilities Reference Manual, Vol 2

tr(1) MPE/iX Shell and Utilities tr(1)
PORTABILITY
POSIX.2. x/OPEN Portability Guide 4.0.
Backward compatible with both the UNIX Version 7 and System V variants of this command,
but with extensions (C escapes, handles ASCII NUL, internationalization).
MPE/iX NOTES
For information on how the current
MPE/iX implementation may affect the operation of this
utility, see Appendix A, MPE/iX Implementation Considerations.
1-614 Commands and Utilities