ISBN Check
by BurakG. - eniyi@yahoo.com

Check out other programs from Useful Programs
http://usefulprogs.tripod.com 

This is the only ISBN checker for TI calculators.
This program checks the syntax of the ISBN of a book and the origin
of the book is also detected. 
Run the program and enter the ISBN without any dashes between
the numbers. You can enter the X with the X,T,Theta key, in case
of the presence of X in the ISBN. Then, the program will check the
syntax. ,If it is correct, entered ISBN is automatically saved 
to variable I. 