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@@ -7,6 +7,8 @@
 
 Verify if this is a worthy status to seek and, if so, declare it on the `README.md`.
 
+[Strictly Conforming POSIX Application](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap02.html#tag_02_02_01).
+
 ## TODO Add dark mode CSS media query for HTML pages {#task-0c5d9ffc-435e-b395-48ef-29a84bb689e9}
 - TODO in 2021-08-20