So if you look it in most of the cases we know that Charles Babbage is considered as a father of computing in most of the book you are going to have these things. So Charles Babbage has defined a calculating devices in 1830, he is a British mathematicians we are doing calculating we know we are doing many more job with pen and paper you say that why you cannot do it automatically. So for that he is coming up with a calculating device and this is called as your analytical engine and the era of this particular automatic computing started somewhere in 1830.

Then we are having the concept of our programming how to program these things how to control this particular calculating devices. For that that Lady Augusta Ada has come up with this particular programming concept. So we are having an initial programming language called Ada that is also somewhere in between 1816 to 1852. So she developed a computer programming language called Ada and we have started with Ada, but nowadays Ada we are not used it.

So we are having the issues how to give input to the computer how to put all the information in a computer so that computer can operate. For that we need some mechanism. So Herman Hollerith developed this particular punched card system to store our data. So what it basically does depending on my information we put those things in a paper through holes. So we punch the card and once we punched the entire information in the card then the state of the card will be given to the computer and the computer reads from that particular card.

Another machine has been developed by Atanasoff Berry computer known as Atanasoff berry computer is the name given to the experimental machine for solving simultaneous linear equations. So to solve simultaneous linear equation Dr. John Vincent Atanasoff and Clifford E. Berry developed a particular machine. So this is also known as the initials of this particular name ABC. So this is another computing machine that we have in our history which is known as your ABC Atanasoff berry computer and it can solve simultaneous linear equation.

Then we are coming to the George Boole invention. So this English gentlemen are mathematicians come up with the Boolean algebra and that Boole’s theory is basically used to solve our algebraic problem. So this is the interfacing between our logic and computing.

Then finally, the first computers comes in 1944 which is your Mark I. It was developed in 1944 the Harvard Mark I designed primarily by professor Harvard Aiken this is launched today. So this is the view of the computer it is a very big machine so it is a programmable electromechanical calculator designed by Professor Harvard Aiken built by IBM and installed in Harvard university in 1944 just I am just distrbuting just giving the diagram.

Now I look into it then you can categorize the computer into different categories so till now have seen the early histories only now we will see how you are coming to the present level. So in early period till 1940 the technology used is your electrical and mechanical and electromechanical.

Now, Moore's law reads us like that Moores law refers to an observation made by Intel cofounder Gordon Moore in 1965, so way back in 1965 Moore has observed something. He noticed that the number of transistors per square inch on integrated circuits has doubled every 2 years.