* Fraction keys (for fraction arithmetic).
* A percentage key.
* A Æ’ÃŽ key.
* Memory access keys.
* An EXP key and a sign change (+/-) key.
* Square (x2) and square root (�ã) keys.
* Logarithm and exponential keys (base 10 and base e).
* A power key (ax, xy or similar).
* Trigonometrical function keys with an INVERSE key for the inverse functions.
* Capacity to work in both degree and