
Keyguards metal covers with holes that are placed atop the computer keyboard, there is a hole for each of the keys. Students using a pointing device of those with poor fine motor control may find it easier to target specific keys, because the holes allow only one key at a time to be pressed.

Moisture guards also keyboard protectors or keyboard skins to protect the keyboard from moisture. This device can be used for students that drool or usually spill and drop things. This protects the keyboard and makes it more hygienic.
Source:
Dell, A., Newton, D.,
& Petroff, J. (2012). Assistive Technology in the Classroom. Upper Saddle
River, NJ: Pearson Education, Inc.
Great job with describing these keyboards. I admit, I haven't thought about the need to protect keyboards from door and moisture, but this need makes sense. I was researching keyboards to fit people with varying physical abilities - this brought another perspective. Thanks.
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