There was a time when human do not know any language and they use symbols to communicate like we see in the old manuscripts. The old manuscripts also tells us that there was a time when there is no civilization and people used to live in caves, then the time had changed and the human develop his own language.

Now in this modern era we are so advance that we can set a communication pathway between our brain and a machine, surprised !!!. This technology is known as Brain Computer Interface(BCI) or Brain Machine Interface.
The BMI is a technology which can replace IOT in future, because in IOT we connect all the things by Internet but here we control them by our brain's electric signals.

Elon Musk one of the biggest entrepreneur and researcher has a startup named as Neuralink which focus on how improve the communication by using BCI.The history of brain–computer interfaces (BCIs) starts with Hans Berger's discovery of the electrical activity of the human brain and the development of electroencephalography (EEG). In 1924 Berger was the first to record human brain activity by means of EEG.

The technology is basically the study of that signals of the brain that are passed through the head when we think of doing something and these signals have electric properties.But these signals are too weak to detect so by using EEG.Then these signals are amplified and transferred into the machine in the form of binary bits then accordingly the machine reacts.It is a proud moment for India that an Indian researcher Prof. Diwakar Vaish built first mind controlled wheelchair of the world