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List any four differences between the present computers and the pre-electronic age computers.

Answer Text:
-Present computers use electricity as the source of power while preelectronic age computers used steam
as source of power.
-Present computers use both printouts and softcopy output while pre-electronic age computers relied on
printouts only for output.
-Present computers use various types of input devices while preelectronic
age
-computers used punched cards for input.
-Present computers are smaller in size than the pre-electronic age computers.
-Present computers store data within their memory while preelectronic
age
computers could not
store data within them.