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# Utility Functions
+This section documents various utility functions that may help
+with application portability. These are not fundamental to NNG
+or Scalability Protocols, but we find them useful for a variety
+of other uses.
+
- [nng_clock](nng_clock.md)
- [nng_id_map](nng_id_map.md)
- [nng_msleep](nng_msleep.md)
+- [nng_random](nng_random.md)