| 1. | Overlay keyboards generally consist of a flat grid of unmarked buttons.
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| 2. | Overlay keyboards are also used in education, especially at the primary level.
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| 3. | Overlay keyboards have several advantages over mice.
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| 4. | Overlay keyboards are easy to clean, and are much more resistant to spills or dust.
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| 5. | The ability to change overlay sheets also makes it easy for a single overlay keyboard to have several different uses.
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| 6. | Overlay keyboards are probably most often found in fast food restaurants, where they reduce the amount of time required to enter items.
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