TeachText was derived from the Edit application, which was a simple text editor for the early pre-System 6 Apple Macintosh computers. Edit was included with early versions of the basic system software to demonstrate the use of the Macintosh user interface, and as the primary code editing tool for the original 68000 Macintosh Development System. While Edit was a tool and demonstration program for developers, TeachText was used mainly by users to display ReadMe documents.
