Also known as Plain File.
A file that contains only ordinary textual characters with essentially no formatting. Text files contain readable characters such as letters, digits, and punctuation (including spaces), along with some control characters such as tabs, line feeds and carriage returns. This simplicity allows a wide variety of programs to display their contents. Under the Windows operating system, a file is regarded as a text file if the suffix of the name of the file (the file extension) is 'txt'.