overlay keyboard meaning in Hindi

Examples

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