How many uses are there for Microsoft Excel?

There is no real limit to the amount of things you can do with Excel and most other major computer applications. It is down to your imagination and ingenuity. Excel provides many features and facilities, but it is down to the users as how they use them and what they can achieve by using them. Broadly speaking a spreadsheet is used for numerical analysis and manipulation, but there is a lot more you can do with it. It would be impossible to list them all here. See the related questions below for some ideas.