A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Yes, you can do it in both apps
Using Sequential Document Serial Numbers
http://word.tips.net/T001747_Using_Sequential_Document_Serial_Numbers.html
Auto-incrementing Form Fields – Serial Number
http://word.tips.net/T001329_Autoincrementing_Form_Fields.html
Using sequential numbers – Serial Number
http://www.mcgimpsey.com/excel/udfs/sequentialnums.html
Generating Unique Numbers for Worksheets – Serial Number
http://excel.tips.net/T003336_Generating_Unique_Numbers_for_Worksheets.html
Summary: You may need to automatically generate unique numbers when you create new worksheets in a workbook. Here's a couple of easy ways to do it. (This tip works with Microsoft Excel 97, Excel 2000, Excel 2002, Excel 2003, and Excel 2007.)