Durham Topas Tutorials
There are various tutorial sets available for learning some of the Topas functionality:
For a simple set of tutorials go here.
For an extensive set of topas/jedit tutorials go here.
If you're a jEdit user then browse through the .inp files in TOPAS_v*_Menus/Examples.
[Modified 21-Mar-2018 by John S.O. Evans. Pages checked for Google Chrome.]