TeachText
Encyclopedia
The TeachText application is a simple text editor
Text editor
A text editor is a type of program used for editing plain text files.Text editors are often provided with operating systems or software development packages, and can be used to change configuration files and programming language source code....

 made by Apple Computer
Apple Computer
Apple Inc. is an American multinational corporation that designs and markets consumer electronics, computer software, and personal computers. The company's best-known hardware products include the Macintosh line of computers, the iPod, the iPhone and the iPad...

 bundled with System 7.1 and earlier, and was one of the only applications included with the Mac system software, leading to its most frequent role as the application to open "ReadMe" files. It was named "TeachText" as a nod to its role in tutorials and other introductory materials at the time. It supported only text in the default text font (12-point Geneva, at the time), with formatting such as bold, italic and underline, using the MacRoman text encoding, and had limited support for embedded images achieved by replacing non-breaking space
Non-breaking space
In computer-based text processing and digital typesetting, a non-breaking space or no-break space is a variant of the space character that prevents an automatic line break at its position. In certain formats , it also prevents the “collapsing” of multiple consecutive whitespace characters into a...

s with images loaded from the file's resource fork
Resource fork
The resource fork is a construct of the Mac OS operating system used to store structured data in a file, alongside unstructured data stored within the data fork. A resource fork stores information in a specific form, such as icons, the shapes of windows, definitions of menus and their contents, and...

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The underlying text engine was the TextEdit Manager built into Mac OS, which had a limit of 32k on text files, leading to occasional frustrated outcries among its users since it was also the default application in the Macintosh operating system for opening text files that had lost their association with a particular program and thus were "orphaned".

TeachText was derived from the Edit application, and later evolved into SimpleText
SimpleText
SimpleText is the native text editor for the Classic Mac OS. SimpleText allows editing including text formatting , fonts, and sizes. It can be considered similar to Windows' WordPad application...

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