![The four virtual keyboards evaluated. The keys were square and had a... | Download Scientific Diagram The four virtual keyboards evaluated. The keys were square and had a... | Download Scientific Diagram](https://www.researchgate.net/publication/261950938/figure/fig1/AS:296871957417987@1447791198770/The-four-virtual-keyboards-evaluated-The-keys-were-square-and-had-a-height-and-width-of.png)
The four virtual keyboards evaluated. The keys were square and had a... | Download Scientific Diagram
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