Is "rtf" format "Rich Text File?"?

yes

It is “Rich Text File.”

It s “Plain Jane/John” text. It is readable by most Word Processing programs.

DOC and DOCX are Microsoft proprietary formats and are not always immediately usable by another system

RTF is somewhat of a generic equivalent. It retains some formatting (underline, bold, for example) which makes it more sophisticated than a plain TEXT or TXT file, but RTF is generally accepted by other systems (MAC, for example).

It’s a small step above a plain text file.

Thanks guys.