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The original computers did NOT have:

1) Keyboards: Data and instructions were entered via punch cards.

2) Screen video output: Again, data came back via punch cards.

3) Data storage within the computer (hard disks, etc.:) You fed the date card in when they were needed.

4) Internal instruction storage (programs:) The whole processing unit was consumed with crunching numbers.

etc.etc.etc.

If you want to read a good book on the development of the computer see Dyson's "Turning's Cathedral." It is recently (last few months) published. PLZ Note: It's not a quick and easy read.

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