Is it possible to upgrade the TI-OS of an 83+ with the TI-OS of an 83+SE? I think it is, but ... And how can you upgrade the TI-OS from calc to calc, or is this impossible? Adriaan Coosemans e-mail: adriaanc@mail.com -- _______________________________________________ Sign-up for your own FREE Personalized E-mail at Mail.com http://www.mail.com/?sr=signup