I use this calculator about every day, there are hundreds, thousands even, of programs you can download from the internet to help you with everday things, especially if you are a student. I would highly recommend this calculator to anyone. I've dropped it many times, and still works the same as it did brand new. This is such an improvement over the TI83, with more memory, and an apps button. Everything is really fast, even graphing complex functions. The graphing function is a great help if your a student, find intersections of graphs, linear regression, and more.