Today’s development of information and communication technology is due to the contributions of many scientists, visionaries, engineers and inventors. Wired and wireless communication systems, increased computing power of computers and development of microelectronics have brought ICT within reach today.

The development of the modern computer began with Charles Babbage (1791-1871), an English engineer and mathematician. Many call him the father of modern computers. He created the Difference Engine. In 1991, an engine was built as described by Charles Babbage at the Science Museum in London. It was found to be working correctly and he later designed a calculating machine called the Analytical Engine.

However, the poet Lord Byron’s daughter Ada Lovelace (1815-1852) thought about how to make the calculation more effective. Ada became interested in science and mathematics from an early age because of her mother. When he met Charles Babbage in 1833, he came up with the idea of ​​’programming’ to implement Charles Babbage’s Analytical Engine. For this reason, Ada Lovelace is credited as the originator of the concept of programming. In 1842, Charles Babbage gave a lecture on his engine at the University of Turin. At that time, Ada Lovelace, with the help of Charles Babbage, calibrated the working process of the engine in stages. When the note was republished in 1953, 100 years after her death, scientists realized that Ada Lovelace had introduced the concept of algorithmic programming.

Scientist James Clerk Maxwell (1831-1879) published the concept of electromagnetic force. The idea of ​​the electromagnetic force made possible wireless transmission of messages.

Bengali scientist Jagadish Chandra Bose James Clark Maxwell (Jagadish Chandra Bose) (1858-1937) was the first to succeed in sending messages from one place to another without wires. In 1895, Jagadish Chandra Bose was able to transmit information from one place to another using microwaves. But his discovery did not get universal recognition as it was not published.

Italian scientist Guglielmo Marconi (1874-1937) received universal recognition for the first publication of the same work using radio waves. For this he is recognized as the inventor of the wireless device. After the development of electronics in the 20th century, the first American company, IBM, developed the mainframe computer. Gradually, the invention of the microprocessor in 1971 paved the way for cost-effective computers.

Arpanet was discovered using the Internet Protocol in the 1960s and 1970s by Guglielmo Marconi. It can be said that since then the interconnection between computers through the network started to develop. And as a result of this development, the Internet was created. In 1971, American programmer Raymond Samuel Tomlinson (Raymond Samuel Tomlinson) started correspondence through electronic means on ARPANET. He was the first to introduce the e-mail system.

After the introduction of the microprocessor, personal computers began to be developed using it, especially in the United States. Steve Jobs (1955-2011) and his two friends Steve Wozniak (Steve wozaniak) and Ronald Wayne (Ronald Wayne) launched a company called Apple Computer on April 1, 1976. The company is currently one of the largest companies in the world. Apple has developed various stages of personal computers.

On the other hand, in 1981, the IBM company assigned the responsibility of William Henry Bill Gates (born October 28, 1955) and his friends to Microsoft to create their own personal computer operating system. Developed MS DOS and Windows operating systems. Most of the world’s computers are currently managed by the operating system software of the Microsoft company founded by Bill Gates.

In 1989, a British computer scientist named Sir Timothy John Berners-Lee (born June 8, 1955) proposed and implemented information management using the Hypertext Transfer Protocol (http). He is known as the father of World Wide Web (www). As a result of the development of network technology, the Internet spread among different countries of the world. A powerful economic system is built around the Internet and a variety of application software is developed.

The most popular social media in the world today is Facebook. Facebook was started by Harvard University student Mark Zuckerberg (born May 14, 1984) and his four friends. Initially it was confined only to university students but nowadays many people use Facebook. This number is increasing every day. Many of us in Bangladesh use Facebook as a means of social communication.