Casio V.P.A.M. calculators

is an infix system for entering mathematical expressions, used by Casio in most of its current scientific calculators.

In 1998, the Casio fx-991W model used a two-tier (multi-line) display and the system was termed as S-V.P.A.M.

The model featured a 5×6-dot LCD matrix cells on the top line of the screen and a 7-segment LCD on the bottom line of the screen that had been used in Casio fx-4500P programmable calculators.

It allowed the display of expressions of fractions, exponents, logarithms, powers and square roots etc.

In early 2015, Casio introduced a new line of calculators called ClassWiz (stylized as C L A S S W I Z) for different markets, featuring a high resolution (192×63) dot matrix Natural Textbook Display and incorporating spreadsheet functions in some models.

In late 2022, Casio introduced a second generation of ClassWiz line, called fx-CW.