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I can't imagine using two calcs at the same time during a test... one should be fine. As to whether or not you should get one with a CAS, I don't know.
Mhmm, the last few posts suddenly changed my mind more to a 89, lolAnd no, I don' have a silverlink.EDIT: I got now a TI 89 for $52 including shipping
Thanks to its USB port, the 89T is clearly better than the other TI-68k models.
It would be funny if at a math test, a student had about 20 TI calcs on his school desktop.
The only problem is that TI-Connect doesn't work well on mac os x for some reason, which requires me always to use another OS. But perhaps I should poke Jim to install TILP on it.