public RetailCalculator() {
//set object variables
super("Retail Sales Calculator"); //window title
setSize(250, 250); //set window size
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //window close
GridLayout grid = new GridLayout(7, 2);
setLayout(grid);
department = new JLabel("Department");
dept = new JComboBox();
dept.addItem("Select");
dept.addItem("Apperal");
dept.addItem("Automotive");
dept.addItem("Cosmetics");
dept.addItem("Jewlry");
dept.addItem("Pets");
dept.addItem("Pharmacy");
//add ItemListener...combobox and jtextfield
dept.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent ie) {
String str = (String)dept.getSelectedItem();
itemNum.setText(str);
} //end public void
}); //end item listener
number = new JLabel("Item Number");
itemNum = new JTextField(10);
name = new JLabel("Item Name");
itemName = new JTextField(10);
price = new JLabel("Original Price");
itemPrice = new JTextField(10);
discount = new JLabel("Discount");
itemDisc = new JTextField(10);
sale = new JLabel("Sale Price");...
...Calculator
Definition of calculator:Pronounce as “cal·cu·la·tor (Noun)” Something used for making mathematical calculations, esp. a small electronic device with a keyboard and a visual display. 


Different kinds of calculator * Basic Scientific Calculators * Advance scientific calculator * Graphic scientific calculator * Financial calculator * Other 


 HANDHELD...
...Calculators are a way of doing mathematical equations when used correctly. They are also a useful tool in learning mathematics. The use of calculators have only had part in the benefit of education, and with widespread availability, a full range of sizes, and a price range for any budget there should be no excuse not to own a calculator or restrict the use of calculators. Current issues with calculators have to be dealt...
...Calculators can perform math functions quickly and easily. The most common functions are addition (+), subtraction (), multiplication (*) and division (/). Press the “=” sign to get the answer. Note that many calculators use different symbols for multiplication (x) and division (÷), and "C" for "Clear"—the erase function.
To use the calculator,
The Simple Virtual Calculator supports the following operations:
• Addition (key '+')...
...Calculator in the Exam Room
Affordable technology is continually reducing the amount of thinking we need to do in daily life. With the widespread popularity of digital watches, for example, we do not need to know how to tell time anymore. Computers, another thought  saving device, are becoming ever more sophisticated with the advent of artificial intelligence software. Recently, technology has been creeping into the classroom. Increasingly, teachers are allowing the use of...
...
The most enchanting, aweinspiring and enhancing invention is the calculator. It is first invented by Blaise Pascal. It is a small hand device which contains lot of symmetric functions. It is a pocket tool. It works like a human brain. It is a small device and has a small brain in it. It has soft buttons attached to it. We can carry it anywhere. It has a minimum weight age. Nowadays calculators are more advanced. They may also work on the principle of solar...
...Conditions of use of GDCs in examinations from 2008 onwards
Graphic display calculator (GDC) models recommended for all subjects that allow calculators to be used
Texas Instruments
TI83 Plus/TI83 Plus Silver Edition/TI84 Plus/TI84 Plus Silver Edition
Casio
CFX9850 GC Plus/FX9750 G Plus/CFX9950 Plus/FX1.0 Plus/FX9860 G/FX9860 AU/FX9860 G SD/Graph 35 Plus/Graph 65 Plus/Graph 85/Graph 85 SD
(See the Handbook of procedures for the Diploma...
...Hanna Huisman
Mr. Westman
History of the Calculator
February 18, 2013
The History of the CalculatorCalculators are used daily by many Americans around the world. For me I used my calculator daily while I am participating in my Finical Algebra class. It not only is convenient for me to use to I am able to get equations more quickly and efficiently, but also it helps me see graphs that I have created with the equations given to us....
...many scholars has really tried to develop their own computer system, being a calculator or analytical machines. Examples of these scholars include Charles Babbage who is known as the father of computer, Blaise Pascal who developed pascal programming language, Ada Augusta, etc. And Thomas Colmal who was a calculator inventor which is the case study of this project, ie this was based on how a standard and scientific calculators can be developed with the...