Not everyone is familiar with Excel. You can protect the data input process by using Excel's UserForm object to collect data. Susan Harkins explains how.

How to Insert a Combo Box in Excel 2010. Combo boxes are a useful way of entering data into an Excel spreadsheet, combining the flexibility of a text field with the convenience of a list box ...

How to Use Auto Complete in a Combo Box in Excel 2003. Excel offers tools and characteristics that make it an ideal platform for you to create data entry forms. One such feature is form controls ...

Thanks to the linked cell property in Microsoft Excel, it's super easy to use the selected value as a condition in a macro or conditional formatting rule.