What are the two commonly used text file formats?

The two commonly used text file formats are:

1. Plain Text (.txt): This format contains only basic text characters without any formatting or special features. It is widely supported and can be opened and edited by most text editors.

2. Rich Text Format (.rtf): This format allows for basic formatting such as bold, italics, and underlining, as well as the inclusion of images and tables. It is commonly used for documents that require some formatting but do not need the advanced features of a word processing program like Microsoft Word.

- Plain text (.txt)
- Rich Text Format (.rtf)