- Tcl/Tk Applications
- The interpreters which implement Tcl and Tk.
- Tcl Commands
- The commands which the tclsh interpreter implements.
- Tk Commands
- The additional commands which the wish interpreter implements.
- Tcl Library
- The C functions which a Tcl extended C program may use.
- Tk Library
- The additional C functions which a Tk extended C program may use.
- The keywords from the Tcl/Tk man pages.