Also known as a Comma Separated Value file, a comma delimited file is a standard file type that a number of different data-manipulation programs can read and understand, including Microsoft Excel.

Image: 200dgr/Shutterstock The article, Use a custom format in Excel to display easier to read millions uses a custom format to make large values more readable.

Sending Excel files containing crucial financial and business data has risks. To add a layer of protection, you should learn to password protect an Excel file.