3.6.3. Components of a Computer

So one simple example I can say that now in general I can say that we are fetching the instruction then we are executing it after completion of the executing we are going to fetch the next instruction. So this is the way we are going to set up fetch and execute, but after fetching some instruction if we know that that instruction needs some data then we have to fetch this particular data from the memory. So for that we are having this particular indirect cycle we are going to fetch the data from the memory and that data will be supplied to the execution unit and it is going to execute it completely.

The fetch and execute cycle is a fundamental process in computing. It begins when the computer fetches an instruction from its memory. After fetching, the computer executes the instruction. Once this execution is complete, the computer fetches the next instruction. If the instruction requires additional data, the computer goes through another step known as the indirect cycle. Here, it retrieves the necessary data from memory using a specific address, which is then used in the execution unit to perform the desired operation.

Think of this process like a chef in a kitchen. The chef first looks at a recipe (fetching an instruction), then prepares the dish (executing the instruction). Once the dish is done, the chef looks at the next recipe. If any dish requires additional ingredients (data), the chef must go to the pantry (memory) to gather those ingredients before finishing cooking. This methodical approach ensures that each dish is prepared according to its recipe.

Ok. 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.

Charles Babbage is often referred to as the father of computing because of his invention, the Analytical Engine, in 1830. This machine was designed to perform calculations automatically. Before this invention, calculations were made manually, which was time-consuming and prone to errors. Babbage's work laid the groundwork for future computers, making it possible to perform complex calculations mechanically.

Imagine trying to calculate large sums using a pencil and paper. Charles Babbage thought, 'Why not create a machine that can do this for us?' Just like how a calculator simplifies our calculations today, Babbage's Analytical Engine was a revolutionary step toward automating computation, helping people save time and reduce errors.

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.

In order for computers to operate efficiently, there needs to be a reliable way to input data. Herman Hollerith introduced the punched card system, a method where data is encoded into cards using holes. Each hole or absence of a hole corresponded to specific information, allowing the computer to read and process data. This innovation was pivotal in the development of data storage methods and input mechanisms in computing history.

Think of punched cards like a voting ballot. Just as voters fill out ballots by marking choices in designated areas, Hollerith's system used holes in cards to represent different pieces of information. This way of inputting data was a major step forward, allowing computers to 'read' and 'understand' the information stored on each card.

Now if 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.

Computers have evolved significantly since their inception. Early computers relied heavily on electrical, mechanical, and electromechanical technologies. As time progressed, innovations such as vacuum tubes, transistors, and integrated circuits transformed computers into more efficient, compact devices. Each technological breakthrough not only improved performance but also allowed for the design of smaller and more powerful computers.

Consider how a car has evolved over the years. The early models were large and made with heavy materials, focusing more on mechanical functions. However, modern cars now use lightweight materials and intricate electronic systems to improve speed, efficiency, and comfort. Just like the transition from mechanical to electronic in cars, computers transitioned from bulky, electromechanical systems to sleek, compact devices using advanced circuitry.

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