Did you ever notice that the 82 and 85 have the same case, just different colors? Same with the 83 and 86. Judging by TI's pictures, same with the 73 and 89 as well. Note that all 6 calcs (all 3 case designs) are very similar in size. >I'm guessing it will be the same size of the 86. I think the 86 is >/slightly/ bigger than the 83 in size.