The answer is : variables
When viewing data entered into a spreadsheet, the columns identify Variable. The variables later can be used on a formula to help you process any sort of data that is implemented within excels' formula system
<span>Dragging or sizing affects only a "Selected Object." For example, an image, you need to click the image in order for you to select that image. The image is considered as an object. From the time you click on the picture, there are points visible where you can click and drag upon it nor resize.</span>
System operations of the website u are asking to access
Factory reset or install a new OS without keeping the data.