Changes

Terminology is the most important thing to understand and it must be remeber remembered that when the Disk Operating System (DOS) came out in 1981 as PC DOS on the IBM, it was to replace the corproate corporate filing systems of the at that time.

When you had lots of files , they had to be grouped up. These were usually kept in what are called Hanging Folders.

There is a physical limit to how many files fit into a folder, as there is a limit to the amount of folders that will fit into a filing cabinets drawer.