in the past it was not fount any networks so it was alot of time lose cause if you from canada and another one from germany and you need to send to it files or message how can you make ?
you have to go to him and it was take along time ...
the mainframe computer :
in the past it was found abig computer called mainframe its asuper computer cause it was having abig storage memories and its too speed cause it having a great processing speed and very expensive !
hmm so what was can be use this main frame look at this photo it will share to you what was working on the networking
it was connected to another pc's and this pc's called Dump terminal and when the employee finish him or her works he should save him or her files on this mainframe and this pc's was send input to the mainframe and out put from the main frame and the pc about user1 can enter to the pc about user 2 or 3 or 4 one of those combinations or pc2 can enter to the pc3 or 4 or one of those combinations ...
Now it found alot of pc's (Personal computer) and can communicate by the cables and abig company not need to get the mainframe we can now share with us alot of files and exchange fot informations by cables !
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