+If you are using Windows, you can use any editor that lets
+you work with plain text, such as NotePad or WordPad. Word
+processors, such as Microsoft Word or WordPerfect, typically
+do not work since they insert all sorts of behind-the-scenes
+information, although some allow you to save files as "Text
+Only". You can also download text editors designed
+specifically for programming, such as Textpad
+(http://www.textpad.com/) and UltraEdit
+(http://www.ultraedit.com), among others.
+
+If you are using MacOS, the same concerns apply. MacPerl
+(for Classic environments) comes with a simple editor.
+Popular external editors are BBEdit (http://www.bbedit.com)
+or Alpha (http://alpha.olm.net/). MacOS X users can use Unix
+editors as well.