"A cable operator usually doesn't actually handle any data transfer but just sell wavelengths to different providers. Each one usually has a separate laser and then they are all multiplexed by a piece of optical equipment into a fibre strand. This method of sending multiple wavelengths is called dense wavelength division multiplexing."
"King Louis XVI kept his sugar in a locked container and kept the key with him. He would open it up for special guests and personally delivered small amounts of sugar to each person. Similarly, in French noble households it was common for the man of the house to control the sugar-key, and to distribute small amounts of sugar to the family as he saw fit."
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