EntityQ1931456· pop 13· linked from 11 articlesprojection keyboardSign in to saveVirtual device projected onto a surfaceConnectionssensorEntitymobile phoneEntityopticsEntitydiodeEntityinfrared radiationEntityIBMEntityBluetoothEntityfingerEntityUSBEntitystartup companyEntitymicrocontrollerEntityfountain penEntitypersonal digital assistantEntityQWERTYEntityCMOSEntityinput deviceEntitytouchpadEntityvideo projectorEntityvirtual keyboardEntitylaser video displayEntityCategoriesVirtual keyboards