Fun With DOS
After IBM indroduced the first line of personal computers, they came with an
operating system called DOS. DOS stands for Disk Operating System. At first,
DOS was usually loaded from a floppy disk or from a ROM (Read Only Memory),
but when the internal hard disk drive became common in most personal
computers, DOS no longer had to be loaded from a floppy disk or a ROM chip.
DOS quickly became a very popular operating system.
Today, however, DOS is very close to becoming a complete thing of the past.
(Note From Chris: I should have called this article "Don't Let It Die!-The
DOS Story")

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