Important PointsMicrosoft Excel is a spreadsheet program. It's used to create grids of text, numbers, and formulas specifying calculations. It is used to record expenditures and income, plan budgets, and chart data. Excel files are called workbooks. To start a new project in Excel, we need to create a new workbook. Therefore, In MS-Excel, a workbook consists of many (multiple) worksheets. Additional InformationA slide is a single page of a presentation. Collectively, a group of slides may be known as a slide deck. A chart is a graphical representation for data visualization, in which "the data is represented by symbols, such as bars in a bar chart, lines in a line chart, or slices in a pie chart". Cells are the boxes in the grid of an Excel worksheet. Each cell is identified on a worksheet by its reference, the column letter, and row number that intersect at the cell's location.