Umm... Wouldn't that mean that a programer would have to write a program for each ver. of the OS. I think that might lead to the same sort of problems UNIX is haveing. It's been spilt into too meny vers so the base of apps is small for each version. Sence the TI calc user base is so much smaller that would become a huge problem. ,Cal P.S. Thats just my oppenion... I could be wrong.