Personal.XLS - Your Own Personal Worksheet
Personal.XLS is a special name- when you include a Personal.XLS workbook in Excel's XLSTART directory, every time you open Excel, the Personal.XLS workbook will open automatically. If you use Windows/Hide to hide the window that contains Personal.XLS, then it will open quietly - it will be there but you won't see it - unless you choose Windows/Unhide.
So...what's the good of having Personal.XLS quietly lurking in the background? Well, the first benefit is a place to store frequently used macros. The macro recorder has an option to store recorded macros in Personal.XLS - or you can unhide it and copy or type macros directly to it.
If you have a list of information you need to update or access, Personal. XLS may be the place. You can create worksheets in Personal.XLS and set up a macro to use the built in Data/Form to search and update the data. Anytime you are working in Excel, press the shortcut keys to run a macro that will make your Personal.XLS information available.