Burning CDs is also good for holding large amounts of data that could not be split up on several floppys, such as slideshows conaining graphics, animation, & audio.
Every PC does not have a CD writer, so if such a presentation were stored on a vunerable system the omnivorous would destroy it.

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And who is the master of fox hounds?
And who says the hunt has begun?
And who calls the tune in the courtroom?
And who beats the funeral drum?