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diff --git a/how_to_get_the_programming_languages_running_on_your_computer.mdwn b/how_to_get_the_programming_languages_running_on_your_computer.mdwn
index 546cf2c3..9669242d 100644
--- a/how_to_get_the_programming_languages_running_on_your_computer.mdwn
+++ b/how_to_get_the_programming_languages_running_on_your_computer.mdwn
@@ -108,6 +108,14 @@ respectively.
 	If you want the GUI components, I think you'll need to use the
 	"Mac/without MacPorts" installation options above.
 
+	I recommend also typing:
+
+		sudo port install rlwrap
+
+	then instead of `mzscheme` (or `racket`) at the command-line, you should type `rlwrap mzscheme`. This gives
+	you a nice history of the commands you've already typed, which you can scroll up and down in with your
+	keyboard arrows.
+
 *	**To install on Linux**
 
 	Use your packaging system, for example, open a Terminal and
@@ -116,10 +124,18 @@ respectively.
 		 sudo apt-get install plt-scheme
 
 	It's very likely that your packaging system has some version of
-	PLT Scheme available, so look for it. However, if you can't find it you
+	PLT Scheme (or Racket) available, so look for it. However, if you can't find it you
 	can also install a pre-packaged binary from the Racket website at <http://racket-lang.org/download/>.
 	Choose the option for your version of Linux (Ubuntu, Debian, and two
-	varieties of Fedora are available)
+	varieties of Fedora are available).
+
+	As above, I recommend you also type:
+
+		sudo apt-get rlwrap
+
+	then instead of `mzscheme` (or `racket`) at the command-line, you should type `rlwrap mzscheme`. This gives
+	you a nice history of the commands you've already typed, which you can scroll up and down in with your
+	keyboard arrows.
 
 
 ## Getting OCaml ##
@@ -182,6 +198,11 @@ However, if you're not able to get that working, don't worry about it much.
 
 		sudo port install ocaml caml-findlib
 
+	As with Scheme, it's helpful to start OCaml as `rlwrap ocaml`. This gives
+	you a nice history of the commands you've already typed, which you can scroll up and down in with your
+	keyboard arrows.
+	
+
 *	[More details about installing OCaml on Macs, if needed](http://cocan.org/getting_started_with_ocaml_on_mac_os_x)
 
 *	**To install on Linux**
@@ -207,3 +228,7 @@ However, if you're not able to get that working, don't worry about it much.
 	Here are the INSTALL notes:
 	<https://godirepo.camlcity.org/svn/lib-findlib/trunk/INSTALL>.
 
+	As with Scheme, it's helpful to start OCaml as `rlwrap ocaml`. This gives
+	you a nice history of the commands you've already typed, which you can scroll up and down in with your
+	keyboard arrows.
+