My hunch is that QWERTY was a shorthand for "too powerful". I'm pretty sure my math teachers were unaware just how sophisticated the 89's CAS capabilities were.

My hunch is that QWERTY was a shorthand for "too powerful". I'm pretty sure my math teachers were unaware just how sophisticated the 89's CAS capabilities were. Although I do see that the TI-89 is still allowed [1] on the SAT. [1] https://collegereadiness.collegeboard.org/sat/taking-the-test/calculator-policy https://collegereadiness.collegeboard.org/sat/taking-the-tes...