Re: Size of HAL
"but deliberately took artistic licence because having Bowman floating around a room-sized HAL is a more striking and dramatic image."
Did anyone else think that the HAL memory bank room would be practically impossible to service under any sort of gravity and prone for several 'Who, me' stories?
And while we're discussing Asimov - HAL is rather more reasonable than Isaac's vision of MultiVac which in different stories was some city-sized datacenter with cogs and levers and such, and the output was a paper card or such. TV's were by then (50s) not rare anymore. In some stories there were only few MultiVac's around the globe doing all mankind's computation - similar to what Watson predicted at IBM 60 years ago... Isaac had a great mind and many stories are intriguing but he really was no computer visionary.