-Make sure each C<*.sh> file you write is executable, otherwise Tech
-Talk PSE won't be able to run it. (The program gives a warning if you
-forget this).
+Make sure each C<*.sh> or C<*.term> file you write is executable,
+otherwise Tech Talk PSE won't be able to run it. (The program gives a
+warning if you forget this).
+
+The difference between C<*.sh> (shell script) and C<*.term> (a
+terminal script) is that a shell script runs any commands, usually
+graphical commands, whereas a terminal script runs in a full screen
+terminal.