Instruction: For Mathcad 2001i and higher. Extract ZIP-File to the directory "Handbook" in your Mathcad program directory (usually C:\Program Files\MathSoft\Mathcad\HANDBOOK) If there is no HANDBOOK-Folder, create one. In Mathcad use "Help" -"e-Books" to open the handbook. F. Dellsperger e-mail: fritz@dellsperger.net