Humans have the basic ability to build tools that aid in making work easier. It is quite simple to picture life when you have the right tools. The invention of a basic stitching needle, for example, has brought civilization this far. Similarly, the introduction of pulleys and wheels changed the speed of life in the beginning. Later, when power-generating instruments were invented, the speed of wheels was tried to match the pace of the mind. That was made possible by the invention of the miniature wheel known as ‘Gear.’ Human aspirations are now fueled by science and technological inventions and innovations. This idea of developing tools to fulfill the current need and move beyond it is an art, and that art is known as ‘Engineering.’  

According to the Scripture, Nal and Neer were the first engineers to build a sea bridge-Ram Setu, connecting India and Sri Lanka eons ago (Treta Yuga). James Watt (18^th century) had the S.I. unit of power named after him due to his prominence as an important scientist of his time. Engineers are always changing the world. Engineering graduates are having an impact on the world unlike any other, through their invention, creativity, and abundance of knowledge. Engineers have made a significant contribution to science and technology around the world. Engineering plays a key role in supporting the growth and development of a country’s economy as well as in improving the quality of life for citizens.  

Studying the fundamental ideas of Mechanical Engineering supplies the ability in designing machines for various uses. Mechanical engineering is a discipline of engineering that teaches you how to transfer energy into various forms using various methods. Machines were initially created to meet demand with a less human workforce. Later, with the invention of automation, the working style of machines began to change, having a significant impact on the manufacturing industries. However, today’s programmed machines can make decisions without the need for human participation. These significant advancements in science and technology have resulted in better ways of thinking and acting.  

Machine design engineers are in high demand for the creation of new products in the mechanical, electrical, and computer-based industries. In any engineering subject, design engineers are the most knowledgeable. A person with a design engineering background and 10 to 12 years of experience in the mechanical engineering business can become an entrepreneur and start a new product development industry.  

Mechanical engineering, according to experts, will give anyone hoping to take part in the Fourth Industrial Revolution a significant advantage. It is a term for the present manufacturing technology trend of automation and data interchange. Cyber-physical systems, the Internet of Things, cloud computing, and cognitive computing are all examples of this. Industry 4.0 results in the creation of a “Smart Factory.”  

Industry 4.0 will rely heavily on Mechanical Engineers for its evolution, in its quest to connect physical and digital, its adaptation into best practices, and its pursuit of efficiency and sustainability. Developing smart materials, producing smart sensors and miniature sensors (MEMS), full automation of processes, use of robotics, building fail-safe and safe fail intelligence among machines, and so on are some of the areas in which mechanical engineers have to work to contribute to IR-4.0.   

Not only during the Industrial revolutions, but Mechanical engineering has also made significant contributions to the globe since human existence. Mechanical engineers are essential to the world’s development. Mechanical engineers believe in creating things that help human society progress more efficiently. If one wishes to record the contributions of mechanical engineers to the world, he should begin by adding a ‘Pen’ to his list at the top and writing on anything visible around and across the globe today. It is a skeleton of science and technology. It is the evergreen branch of engineering, which could never lose its demand in any way.