TCL or Tool Command Language is a very good tool for the users of Windows, Mac and Unix platforms because it provides the users a scripting environment. TCL provides supports for TCP/IP network related scripting, string pattern matching and string processing. It also offers access to native file system, timer programming and I/O related to event driven processes.

TCL is very easy to use because the knowledge of the traditional programming languages is applied over here like structure, loops, variables, namespaces, DLLs, structured error handling etc.

TK is a program that is used to provide a graphic user interface for Windows, Mac and Unix system users. TCL/TK can be used for developing any commercial stand-alone or embedded application programs. Nowadays in the industry, the term “integration platform” is becoming more and more important and TCL serves this purpose.

TCL has a very high speed of use and has the following features for which it is becoming popular:

· Cross platform interoperability
· Thread Safety
· Internationalization

The users of TCL are very much positive about the future of this project and expect that TCL will come with a number of more innovative features in this open source software community.