Is my following understanding correct?
The 'operating system' on the iPad ( and I suppose also iPhone and iTouch) is all in hardware/firmware so there is no typical system maintenance required other than occasional firmware updates from Apple. This can't be messed up by viruses, etc so there's no need to worry about virus scanner and its updates and other such system tasks. And surfing to unfriendly sites cannot damage the system.
The 'operating system' on the iPad ( and I suppose also iPhone and iTouch) is all in hardware/firmware so there is no typical system maintenance required other than occasional firmware updates from Apple. This can't be messed up by viruses, etc so there's no need to worry about virus scanner and its updates and other such system tasks. And surfing to unfriendly sites cannot damage the system.