Demons can operate electric devices like radios and televisions, but electronic information technology like computers seems mostly beyond their capability, at least of most. They can turn on a computer (even supplying electric current to do so) or turn it off, and enter key and mouse impute in cases of severe infestation, but they seemingly lack the subtlety to change the contents of harddrives or flash memory directly. They can mimic the operation of such devices by producing sound and light output. They can also operate computers through obsessed or possessed people.