More than 250 solutions with 6 keypads: standard/Engineering/Binary/Magnetics/trig/Convert. The Binary keypad is brand new, it helps manipulate unsigned binary integers. It has a complete help system with individual tips. You can select Fixed, Scientific, or Engineering notation and Degrees, Radians, or Grads for your calculations. It has a running tape display (Saves and Prints!), and keyboard entry option for most of the common function.