This is interesting:
http://computer.howstuffworks.com/question474.htm
I think Avatar has some mega coding on it to prevent duplication.
This is purely an economical intervention by the manufacturer.
__________________
All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
************************************
.
Weezie looking at petunias 8.25.2017
****************************
These forums are for mutual support and information sharing only. The forums are not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider. Always consult your doctor before trying anything you read here.