I am using rpn financial calculator.Its website is RpnCalc Financial
Please go to website and click on 'programming'.Check various programs therein. For example 1)annual bond 2)depreciation 3)day- basis bond. 4)Leasing 5)rent or buy 6)full part 7) Effective rate etc.
If anyone interpret programming steps in those program one by one, and the ultimate results those programs would give to its user i would be grateful to that forum member. Okay.