This wasn't so much useless as a creature of it's time. Back when displays were text based, it allowed pausing and unpausing of screen output. This was very useful at the time. Nowadays very few applications make use of it. Excel changes the meaning of the arrow keys when it is selected.
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Pointless Inventions
Sometimes an invention is so useless it’s almost hilarious. Check out these pointless inventions and create your own!
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