The Casio fx-82B Scientific Calculator (1987) is a Enhanced version of the CASIO fx-82A. Added features are the display modes, percentage operation, random number generation, round-off operation, hyperbolic functions, and an OFF key instead of a slider. The Casio CFX-9850GB Plus Color Power Graphic (1999) has a built-in software library, consisting of programs that perform complicated calculations and data processing. For example, operations on differential equations, digital caliper measurements, capacitor charge curves, figure rotations and Riemann sums. These are organized into six sub-libraries, five of them for mathematical computations, and one for scientific instrumentation. The calculators will be carefully packed.