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+PD-ksh is a mostly complete AT&T ksh look-alike (see NOTES file for a list
+of things not supported). Work is mostly finished to make it fully
+compatible with both POSIX and AT&T ksh (when the two don't conflict).
+
+Since pdksh is free and compiles and runs on most common unix systems, it
+is very useful in creating a consistent user interface across multiple
+machines. For example, in the CS dept. of MUN, pdksh is installed on a
+variety of machines including Suns, HPs, DecStations, pcs running Linux,
+etc., and is the login shell of ~5200 users.