Tom Watson’s famous quote. But it’s debatable whether he actually said it. Regardless, given the size of computers in 1948 it was difficult to see anything but the biggest corporations using them.
This was a clear misquote of what Bill Gates actually said and he denies this strenuously. He does admit that he expected 640kb to be enough for ten or so years when people started complaining after five.
Many accurate predictions including change would take longer than expected and networked computers would be on people’s desks by 1995.
The specification for the original Osborne luggable was that it had to fit under an airline seat. It did, sort of. It cost $1800 in 1981, weighed 12kg , 64Kb memory, no battery and it had to be plugged in.
Motorola DynaTAC 8000 was the first mobile phone. Developed in 1973, the service didn’t actually roll out for nearly ten years.