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Anyone working in industries that require calculations of complex graphs and charts will definitely need a graphing calculator to aid them in their line of work. Why not go the extra mile and purchase one with touch screen capabilities? After all, there is nothing so natural as to draw graphs on paper, so the same experience can be transported to a digital world. The ClassPad 300 offers a 160 x 120 pixel touch screen and allows one to key in equations via handwriting. It has a very user friendly interface and offers typical Windows drag-and-drop functions. Other features include 3-D graphing trace, zoom, rotate, expression processing, text statements, and eActivity functions. Pick one up for $150 today.

Pros : Easy input and user interface
Cons : Low LCD contrast

Casio ClassPad 300 Touch-Screen Graphing Scientific Calculator Source