+ * SHOW.
+
+ * SORT CASES now sorts stably, that is, two cases with equal sort
+ criteria will be in the same relative order before and after the
+ sort.
+
+ * T-TEST (re-written).
+
+ * DATE and USE. These commands are parsed but otherwise ignored,
+ to enhance compatibility with certain command files that invoke
+ them unnecessarily.
+
+ * VARIABLE WIDTH, VARIABLE ALIGNMENT, and VARIABLE LEVEL. These
+ currently have no effect on PSPP output, but their values are
+ written to and read from system files and thus may affect
+ third-party software.
+
+ * SET EPOCH implemented.