Plain text is a document format in which textural information is stored just through the text characters (including line-breaks, tabs, and other symbols) themselves. There are no additional formatting instructions or markup in addition to the text itself.
The Rich Text Format (RTF) is a method of encoding formatted text and graphics for transfer between applications. RTF uses the ANSI, PC-8, Macintosh, or IBM PC character set to control the representation and formatting of a document, both on the screen and in print. With the RTF, documents created under different operating systems and with different software applications can be transferred between those operating systems and applications.
The format is widely supported by word processing applications on the MS-DOS, Windows, OS/2, Macintosh, and Power Macintosh platforms. Many other types of applications and tools on other platforms also supports saving and reading documents in the RTF format.