3.1 Open Source
TCL is an open source language. This means that your program is run by sending
the source code (the script itself) of it to the TCL program
which processes it, without compiling it unlike languages
like C. This means that people can always look at your programs
source code and see how it is written, because of this you
will have less problems with incompatibility on different
computers because the TCL language is always the same.