Spreadsheet
A spreadsheet is like a digital table made up of little boxes called cells. These cells are put in rows (like lines in a book) and columns (like vertical lines). Each cell has a special name that tells its position, using letters for columns and numbers for rows. For example, a cell might be called "C10." This idea of giving cells names was first used in a program called LANPAR. Another program called VisiCalc used a similar way of naming cells. You can also talk about a group of cells that are next to each other, like a bunch of cells in a column. This group is called a range. To talk about a range, you use the names of the first and last cells in that group. For example, you can call the first ten cells in the first column "A1:A10." LANPAR did something special too. It allowed you to do calculations that depended on things you would write later. This was helpful and came back later in programs like Lotus 123 and Microsoft's MultiPlan Version 2.