A fully featured scientific calculator is implemented, including trig functions and logarithms, factorials, 12 levels of parentheses, logs to base 2, bitwise logical operators, hex, octal, binary and ascii display.
There are actually two separate calculators with different keypad layouts, a scientific calculator and one for logical operations. To switch from scientific to logical display press the 'HEX' key. To switch back to scientific mode press the 'DEC' key twice (the first press converts the displayed value from hex to decimal but leaves you in the hex calculator).