FRT

The frt file extension is also used for source codes written in Forth.

Forth is a computer programming language originally designed for embedded and real-time applications. Versions are available for Windows, DOS, Unix (& relatives) as well as cross-compilers for most microprocessors and microcontrollers.

Forth is not an assembler, it is a high-level language (although most versions also include an assembler for the target processor). However, it does not really resemble most other high-level programming language. Forth is characterized by an interactive programming style, which dramatically shortens development times, and by extremely small target program size.

Forth provides you with concise, powerful tools to help make optimal use of your system's resources. New users may find Forth's brevity, directness, and apparent simplicity unusual; but soon they're creating custom data structures on the fly and defining new operators, literally extending the language to address the requirements of their application and the characteristics of their hardware.

The frt file extension is also used by Visual FoxPro program from Microsoft.

These frt files contain additional report descriptions. Most likely used in some older version of Visual FoxPro.