You can save these numbers and even apply data to name them. For example, teachers use spreadsheets to keep grades on their entire class. They set up formulas that will automatically calculate a specific students average with just entering one number and hitting the enter key. After each test, all the teacher has to do is enter the grade for that specific test and it will automatically give the overall percentage. As long as you can figure out a specific formula, anyone can do the most complicated computations as well as the simplest.
Spreadsheets also have the capability of forming graphs.
We can make graphs to enhance our papers and presentations. These graphs can be done at a touch of a button. We only have to know the specific codes and tools to perform the task. These PIMs act like a daily planner. We can keep our schedule of classes and of tests.