ISO/IEC/IEEE 9945 defines a standard operating system interface and environment, including a command interpreter (aka shell) and common utility programs to support applications portability at the source code level.
ISO 9949 is redacted(?) by the technical committee ISO/IEC JTC 1/SC 22 (Programming languages, their environments and system software interfaces)
Areas that are not included in the scope of ISO 9949
The following areas are explicitly excluded from the scoe of ISO 9949: