How to Find Scientific calculator is original or duplicate ?

Basically engineering students need a Good quality Scientific Calculator for Problem Solving.

Now-a-days several duplicate and local companies calculator are available in the market with low prize and impressive outlook for sales. But they didn't care about battery cell backup , button quality and more features such as software also.

Here are some steps to check whether the calculator software is original,

Step 1 : Press and hold Following Three buttons at same time

• "Shift button"
•  "Number 7 button"
•  ON button..

Now in the display screen, you should see all options or all pixels are ON.

Step 2 : Then press Shift button continuously till Number '1' appears on the screen.

Step 3 : Now press all the buttons in the calculator starting from Alpha button sequentially, except  for the "ON" button..

Step 4 : After pressing all buttons, finally press "="

then it should show '44 OK'..

If it shows, '44 OK' then the calculator is good for your Engineering Mathematics..

Basically CASIO is a Good brand for Calculators...

Enjoy Calculating :-)