first computers

First computers was invented by a great scientist called charls babage he is also called as father of computers.

first computers

First generation computers

-> The first computers were made of vacuum tubes in which data were stored and processed
-> it was very huge i size and produced a lot of heat
-> It processing speed was very slow
-> Punch cards were used as input and out put device

punch cards

-> Inputs were in format of 1's and 0's in machine level language
->More time was wasted because of slow input device and output devices
-> Was not reliable