.SH "CONFORMING TO"
These functions are not in POSIX.1-2001.
Several operating systems have them,
-e.g., *BSD, SunOS, Digital Unix, AIX (which also has a
+e.g., *BSD, SunOS, Digital UNIX, AIX (which also has a
.BR getfstype ()).
HP-UX has functions of the same names,
that however use a \fIstruct checklist\fP