Figure 1 A sample directory listing

.            dr-      0  Sat Mar 06 14:29:34 1993
..           dr-      0  Sat Mar 06 14:29:32 1993
ddir.c       -rw   2066  Thu Feb 18 08:26:14 1993
cp.c         -rw    899  Thu Mar 04 21:11:58 1993
findfile.c   -rw   1512  Thu Mar 04 21:13:22 1993
ls.c         -rw    933  Tue Feb 16 10:57:36 1993
filecopy.c   -rw    967  Tue Feb 16 21:17:02 1993
cat.c        -rw    794  Mon Feb 15 19:05:16 1993
stderr.c     -rw    562  Mon Feb 15 19:05:18 1993
stderr.h     -rw    161  Mon Feb 15 19:05:18 1993
posix.wpf    -rw  14870  Sun Mar 07 20:30:42 1993
ls.exe       -rw  12820  Sun Mar 07 20:31:02 1993