The files generated by the TextPad Clip Library, which is a text editing tool with robust functionalities, also use the file extension .tcl. The program is capable of editing documents without regard for the file size, as long as it can be handled by the system's virtual memory, and can run on 32- and 64-bit systems of Microsoft Windows Operating System platforms.
Files with the TCL extension identify a data file used in the Scene Language for Interactive Dynamic Environments or SLIDE. TCL files contain descriptions and definitions that are used in the script development environments. TCL files can be opened and edited with the SLIDE application.
SLIDE is a language for describing and interacting with hierarchical, dynamic environments. The SLIDE viewer parses ".slf" into a hierachical DAG which can be rendered using a OpenGL for the 3D graphics and TCL/TK for the windowing interface. SLIDE also uses TCL as its dynamics scripting language. This makes it very convient to then use TK widgets to control and interact with scene elements. SLIDE is intended to be simple for educational purposes. There is an all software implementation of the SLIDE viewer which is broken down into 10 assignments about the graphics pipeline. The rendering pipeline implemented roughly follows the OpenGL model of rendering, and is designed to be easily implemented in a single semester.