All of these extra buttons allow user to work with various kinds of numbers and problems such as these:
Trigonometry problems
Scientific numbers that have a multiplication by 10 to certain power.
Pi problems
Logarithm problems with base 10 and the natural base
Probability problems that use the factorial function.
It's moreover eye friendly user interphase & easy to access with slidable functions keys.
We are working on including an UNIT CONVERTER soon; STAY UPDATED.