(Hewlett Packard) invent Financial Calculator (hp 10bll

A powerful calculator that makes good business sense: 

In business, it's important to get the most for your money. That's why the HP 10bII is the smart choice for business and finance needs.

With the HP 10bII you now have the power to keep up with all your growing course-load, small business or other financial calculations.

You'll be able to work quicker and more efficiently with over 100 time saving, easily accessible business functions. Because it works in algebraic notation, it's easy to learn and use.
 

With so many useful features, and an affordable price, the HP 10bII adds up to a wise investment.

  
Easy to learn and use: 

With the Algebraic Entry System Logic, by entering data in algebraic notation, you are working just as you would if you were solving problems on paper.

Our intuitive keyboard layout with easy-to-read, descriptive labels provides you with extremely quick identification of cash flows and amortization values.

Time-saving business functions: 

You can quickly calculate loan payments, interest rates, amortization, discounted cash flow analysis, interest rate conversions, standard deviation, percent, % change, mark-up as a percent of cost price, margin as a % of price and forecasting based on linear regression, to name a few.

Other Business/Financial Features: 

Variable compounding, Cash flow analysis, Time Value of Money (TVM), Net Present Value (NPV), and Internal Rate of Return (IRR).

Special Design Features:
 
The HP quality keypad allows you to minimize unwanted key presses with large, soft edged keys and generous keyspacing.

Special Design Features: 

- 12 Character display.
- Adjustable display contrast.
- 2 Shift functions.
- Auto power off, after 10 minutes.

Special Operating Features:

- Parentheses for grouping expressions
- Automatic constant
- 3-Key memory
- 15 Storage registers
- Help available on the Web
- Read display results easily, even at an angle
- 12-character, adjustable contrast display

Statistical/Math features include: