itcl: itcl (Object-oriented Programming Contructs to Tcl)
itcl:
itcl: [incr Tcl] provides the extra language support needed to build large
itcl: Tcl/Tk applications. It introduces the notion of objects, which act as
itcl: building blocks for an application. Each object is a bag of data with
itcl: a set of procedures or "methods" that are used to manipulate it.
itcl: Objects are organized into "classes" with identical characteristics,
itcl: and classes can inherit functionality from one another.
itcl: 
itcl: This package contains version 3.4 of itcl which is required by some
itcl: programs.