.\" On some systems, this is the number of swaps out of physical memory.
.TP
.IR ru_inblock " (since Linux 2.6.22)"
-The number of times the file system had to perform input.
+The number of times the filesystem had to perform input.
.TP
.IR ru_oublock " (since Linux 2.6.22)"
-The number of times the file system had to perform output.
+The number of times the filesystem had to perform output.
.TP
.IR ru_msgsnd " (unmaintained)"
This field is currently unused on Linux.