40.2.4 What We Have Left Out

We have left out a number of Tcl commands as they are outside of the scope of this tutorial. We list some of them here to show some of what Tcl can do. Please refer to the Tcl manual for more information.

http
implements the HTTP protocol for retrieving web pages
namespaces
a modules systems for Tcl
trace
commands can be attached to variables that are triggered when the variable changes value (amongst other things)
processes
start, stop, and manage processes
sockets
UNIX and Internet style socket management
exception handling
3rd party extension packages
load extension packages into Tcl and use their facilities as native Tcl commands